George VI Study Group: http://www.kgvi.ca/

W. G. (Bill) Burden - Constant plate varieties on Admiral stamps: https://marlerandbeyond.com/

Paul H Grimm: - Squared Circles of Canada http://squaredcirclesofcanada.com/

D. Robin Harris (Adminware Corp.): https://adminware.ca/stamps.php

Charles Livermore - Canada - World War II Overseas Tobacco Distribution Scheme: http://charleslivermore.com/tobacco/aaindex.html

Charles Livermore - Toronto, Ontario - Named, Lettered and Numbered Post Offices: http://charleslivermore.com/streets/0streets.html

Glen Lundeen - BNA proofs: http://www.bnaproofs.com/index.html

Jim McCormick - Jim's Stamp Projects: http://jimmc.ca/stamps/index.html

Scott Robinson - Constant plate varieties: http://www.flyspecker.com./index.html

John Walsh - Newfoundland Specialized Stamp Catalogue: http://www.nfldstamps.com

Books, articles, blogs, catalogues, etc.

Stamp printer info: Canada - Glenn Morgan:
http://www.stampprinters.info/SPI_country_canada.htm#CANADA

Plate Blocks - Hank van der Linde, Ottawa Philatelic Society:
http://www.ottawaphilatelicsociety.org/resources/articles/canadian-plate-blocks/

Re-entries - Ralph E. Trimble (website archived by the Vincent Graves Greene Philatelic Research Foundation):
https://re-entries.greenefoundationarchive.ca/

King Edward VII Issue of Canada - Tom Meyerhof:
https://www.ottawaphilatelicsociety.org/resources/articles/king-edward-vii-issue-of-canada/

Elizabethan Definitive Stamps Checklists - Robin Harris:
https://adminware.ca/phil_chk.htm

New Canadian stamps - Canada Post:
https://www.canadapost.ca/web/en/blogs/collecting/list.page?cattype=collecting&cat=stamps&affiliate_id=43737&click_id=2423266517

Catalogue of the Federal Tobacco Stamps of Canada - Christopher D. Ryan:
http://www.canadarevenuestamps.com/RyanTobaccoCatalog2side.pdf

Additions, Amendments and Corrections to the Catalogue of the Federal Tobacco Stamps of Canada:
https://sites.google.com/site/canadiantobaccostamps/

A Preliminary Listing of Canada's Bottled-in-bond Liquor Stamps - Christopher D. Ryan:
http://www.esjvandam.com/Canada%20Liquor%20stamps.pdf

Newfoundland Fakes and Forgeries - Ed Wener:
http://www.jacestamps.com/e-books/Newfoundland_Stamps_Fakes_and_Forgeries.pdf

Postal History Corner - Canadian Postal and Philatelic History:
http://postalhistorycorner.blogspot.ca/

Every Householder Mail - Canadian Postal History:
http://everyhouseholder.blogspot.ca/

Canadian Post Office publications including the Monthly Supplement to Canada Postal Guide - Library and Archives Canada:
https://library-archives.canada.ca/eng/collection/research-help/postal-heritage/pages/canadian-post-office-publications.aspx

Post Offices and Postmasters - Library and Archives Canada:
https://library-archives.canada.ca/eng/collection/research-help/postal-heritage/Pages/post-offices-postmasters-canada.aspx

Canada Air Mail First Flights:
http://www.aerodacious.com/Canada1920.HTM

Squared Circle Cancellations - Aaron Gulliver:
http://www.ece.uvic.ca/~agullive/squared.html

Squared Circles of Canada - Paul H Grimm:
http://squaredcirclesofcanada.com/

Videos

The modern postage stamp - Universal Postal Union, 14 March 2014: https://www.youtube.com/watch?v=Fnm0UwRq9cQ

Printing Postage Stamps - Smithsonian National Postal Museum: http://www.youtube.com/watch?v=vk7xhB0pZDI

Stamp Design - Smithsonian National Postal Museum, William H. Gross Stamp Gallery: http://www.youtube.com/watch?v=PCgra1HvglI

Stamp Production - Smithsonian National Postal Museum, William H. Gross Stamp Gallery: http://www.youtube.com/watch?v=G7iAscgzEp4&list=PL43F815ECFFAFA016

How It's Made - Postage Stamps: http://www.youtube.com/watch?v=KETwb4MLKVI

Philatelic Exhibits

American Association of Philatelic Exhibitors: http://www.aape.org/index.asp

EXPONET: http://www.exponet.info/index.php?lng=EN

Links to other philatelic websites

AJ's Encyclopedia of Stamps and Philatelic Links: http://members.tripod.com/~ajward/stamps/links.htm

Stamp Yellow Pages Directory: http://www.stampshows.com/yp.html

Links to British Colonial Stamp Sites: http://www.kgvistamps.com/kgvilinks.htm

Miscellaneous

Software program to create custom album pages: http://www.thestampweb.com//

Removing Self-Adhesive Stamps from Paper - Peter Butler, Royal Philatelic Society of Canada: http://www.rpsc.org/video/soaking-video.htm

Canadian Stamp News: https://canadianstampnews.com/

Details - Canada Post new issue magazine https://www.canadapost.ca/web/en/blogs/collecting/details.page?article=2014/07/23/our_publications&cattype=collecting&cat=details

Philabec: https://philabec.com/

Linn's Stamp News: https://www.linns.com/

BNA specialist societies

Canadian Philatelic Society of Great Britain (CPS of GB): http://www.canadianpsgb.org.uk/

The Postal History Society of Canada (PHSC): https://www.postalhistorycanada.net/php/index.php

La Société d'histoire postale du Québec (SHPQ): http://www.shpq.org/

Canadian Aerophilatelic Society: http://www.aerophilately.ca/

Other specialist societies

American Air Mail Society: https://www.americanairmailsociety.org/

Auxiliary Markings Club: http://www.postal-markings.org/

France and Colonies Philatelic Society: http://www.fcps.org.uk/

The International Machine Cancel Society: http://www.machinecancel.org/

The International Society for Collectors of Revenue Stamps and Documents: http://www.revenuesociety.org.uk/

The King George Sixth Collectors Society: http://www.kg6.info/

Postal History Society: http://www.postalhistory.org.uk/

National philatelic societies

The Royal Philatelic Society of Canada: https://www.rpsc.org/

American Philatelic Society: https://stamps.org/

Regional and local philatelic societies in Canada

British Columbia Philatelic Society: http://www.bcphilatelic.org

Greater Victoria Philatelic Society: http://www.vicstamps.com/

Calgary Philatelic Society: https://calgaryphilatelicsociety.com/

Edmonton Stamp Club: http://www.edmontonstampclub.com/

Saskatoon Stamp Club: http://www.saskatoonstampclub.ca/

The Winnipeg Philatelic Society: http://www.wps.mb.ca

Grand River Valley Philatelic Association (GRVPA): http://www.grvpa.com/

Greater Toronto Area Philatelic Alliance: https://gtapa.org/

Hamilton Stamp Club: http://www.hamiltonstampclub.com/

Ottawa Philatelic Society (OPS): https://www.ottawaphilatelicsociety.org/

Fédération québécoise de philatélie: http://www.philatelie.qc.ca

L'Union des philatélistes de Montréal: http://philatelie-upm.com/

Lakeshore Stamp Club: https://lakeshorestampclub.ca/

Société philatélique de Québec: http://www.societephilateliquedequebec.org/

Nova Scotia Stamp Club: http://www.nsstampclub.ca/

Other philatelic organizations

L’Académie québécoise d’études philatéliques: https://aqep.net/

Canadian Stamp Dealers' Association: https://www.csdaonline.com//

Philatelic Specialists Society of Canada: https://www.philatelicspecialistssociety.com/

Vincent Graves Greene Philatelic Research Foundation: https://www.greenefoundation.ca/

Library and Archives Canada - Canadian Post Office publications: https://library-archives.canada.ca/eng/collection/research-help/postal-heritage/pages/canadian-post-office-publications.aspx

Canadian Museum of History - The Canadian Stamp Collection: https://www.historymuseum.ca/exhibitions/the-canadian-stamp-collection

Vincent Graves Greene Philatelic Research Foundation - Harry Sutherland Philatelic Library: https://www.greenefoundation.ca/library

The British Library Philatelic Collections: https://www.bl.uk/collections/philatelic

American Philatelic Research Library (APRL): https://stamps.org/services/library

Smithsonian National Postal Museum: https://postalmuseum.si.edu/

Universal Postal Union (UPU): http://www.upu.int/en.html

Canada Post: https://www.canadapost.ca/web/en/home.page

Great Britain Royal Mail: https://www.royalmail.com/

United States Postal Service: https://www.usps.com/

Canadian Bank Note Co.: https://www.cbnco.com/

Colour Innovations: https://colourinnovations.com/

Lowe-Martin Group: http://www.lmgroup.com/

All Nations Stamps: https://allnationsstampandcoin.com/

Armstrong's: http://www.armstrongsstamps.ca

Arpin Philately: https://www.arpinphilately.com/

Bow City Philatelics: http://www.bowcity.net

Canada Revenue Stamps: http://www.canadarevenuestamps.com/

City Stamp Montreal: http://www.citystamp.ca/

Hugo Deshaye Philatelist Inc.: http://www.hdphilatelist.com

Deveney Stamps: https://deveneystamps.com/

Durbano Stamp Co.: http://www.perfin.ca/

Eastern Auctions: https://www.easternauctions.com/

Christopher Green Ltd.: https://chrisgreen.ca/

KGVI Stamps: http://www.kgvistamps.com

Jace Stamps: http://www.jacestamps.com/

Longley Auctions: https://longleyauctions.com/

Gary J. Lyon (Philatelist): https://garylyon.com/

Maddy's Philatelic Service: http://computan.on.ca/mastamps

R. Maresch & Son Auctions Ltd.: https://www.maresch.com/

Millbar Stamps: http://www.millbar.com/

Moreland Revenue Stamps: https://www.morelandrevenuestamps.com/

Ocean Park Stamp Auctions: https://www.oceanparkstampauction.com/main.html/

John Sheffield Philatelist Ltd.: http://www.johnsheffield.com

Don Slaughter: https://www.donslau.com///

Sparks Auctions: http://sparks-auctions.com/

Unitrade Associates: http://www.unitradeassoc.com/

E.S.J. van Dam Ltd: http://www.esjvandam.com

Weeda Stamps: https://www.weeda.com/

Zatka Philately: https://zatkaphilately.com/