Queen City Philatelic Society & Eastern Stamp Exchange. The Rocky Mountain stamp. Rocky Mountain Stamp Pub. Co.
Citace podle Chicago (17th ed.)Queen City Philatelic Society a Eastern Stamp Exchange. The Rocky Mountain Stamp. Denver, Colo.: Rocky Mountain Stamp Pub. Co.
Citace podle MLA (8th ed.)Queen City Philatelic Society a Eastern Stamp Exchange. The Rocky Mountain Stamp. Rocky Mountain Stamp Pub. Co.
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