Queen City Philatelic Society & Eastern Stamp Exchange. The Rocky Mountain stamp. Rocky Mountain Stamp Pub. Co.
Chicago-viite (17. p.)Queen City Philatelic Society ja Eastern Stamp Exchange. The Rocky Mountain Stamp. Denver, Colo.: Rocky Mountain Stamp Pub. Co.
MLA-viite (8. p.)Queen City Philatelic Society ja Eastern Stamp Exchange. The Rocky Mountain Stamp. Rocky Mountain Stamp Pub. Co.
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