"The author's intent to issue annual supplements as expressed in the Forward [sic] ... will be carried on by his associates"--P. 2 of cover. "Compiled from the 1996 edition of Scott's postage stamp ...
"It is the intention of the contributors to this work, and of the ATA, to issue annual "upgradeable" supplements"--P. i. "Compiled from the 2000 edition of Scott's postage stamp catalogue, and ...
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