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Baris 14: * [http://www.ingraham.ca/bob/prestwick.html Cover from the 1954 BOAC crash at Prestwick, Scotland] * [http://www.metroairpost.com/covers/crash.html Collecting Air Crash Covers - Metropolitan Air Post Society] * [http://www.postalmuseum.si.edu/museum/1d_Hindenburg.html Hindenburg crash covers] {{Webarchive\|url=https://~~www~~web.~~webcitation~~archive.org/~~66KjY9p27?url=~~web/20120316111538/http://www.postalmuseum.si.edu/museum/1d_Hindenburg.html \|date=2012-03-2116 }} United States National Postal Museum * [http://www.slettebo.no/scout/hindenburg.htm Hindenburg Crash Mail - the Scout Covers] * [http://aerophilately.net/ The Wreck & Crash Mail Society]

Crash cover: Perbedaan antara revisi