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Øverste Hajre Hjorne: Danske Frimærker i 150 År (In the Upper Right Corner: 150 Years of Danish Stamps)
Letter from the Celestial Empire: A Study of the Postmarks on the Cards and Letters from the Warships of the Nine Nations that Maintained a Naval Presence in China from the Middle of the Nineteens Centure to the Twentieth and some Historical Data on China during that Turbulent Period
Bridging the Continents in Wartime: Important Airmail Routes 1939-1945
Special Airship Mail and Postcard Catalog 2005
Svenska frimärket 150 är (The Swedish Stamp 150 Years)
American Air Mail Catalogue: A Priced Catalogue and Reference Listing of the Airposts of the World,
Volume Three (6th ed.)
Fakes Forgeries Experts
German/English Philatelic Dictionary
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