1.
Catalog of the 19th Century Envelopes, Lettersheets, and Wrappers of the United States
by Undersander, D. J., United ...
ISBN: 9780980011296
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U.S. Domestic Postal Card Regulations, 1874 to 1885
by Stendel, Robert, United Pos...
ISBN: 9780980011258
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Catalog of United States Stamped Envelope Essays and Proofs
by Undersander, D. J., United ...
ISBN: 9781732788015
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Catalog of the 20th and 21st Century Stamped Envelopes and Wrappers of the United States
by Undersander, D. J., Pryluck...
ISBN: 9780997074420