First day of issue (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "First day of issue" in English language version.

refsWebsite

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2buckinghamcovers.com

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1postalheritage.wordpress.com

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1web.archive.org

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afdcs.org

"A Short Course on First Day Covers". American First Day Cover Society.

buckinghamcovers.com

Buckingham, Tony. "Glossary". Buckingham Covers.
Buckingham, Tony. "Glossary". Buckingham Covers.

colnect.com

"First Day Cover - FDC : Philatelic Products : Countries List [Subformat: Envelope]". colnect.com. Retrieved 2019-03-29.

gbstamps.com

Milne, Gordon. "In the Spotlight". GB Stamps.

linns.com

Miller, Rick. "Insights Stamp Collecting Basics 2004 December Paquebot mail begins at sea, postmarked on land Paquebot mail begins at sea, postmarked on land". Linn's Stamps.

postalheritage.wordpress.com

Muir, Douglas (2011-12-12). "Rowland Hill & the Penny Black". The Postal Museum.

royalmail.com

Royal Mail (2007). "All About Postmarks" (PDF). Royal Mail. Archived from the original (PDF) on 16 June 2015.

tripod.com

cvpcollector.tripod.com

Neopost Covers

web.archive.org

Royal Mail (2007). "All About Postmarks" (PDF). Royal Mail. Archived from the original (PDF) on 16 June 2015.