5 Cent Unused US Stamps (1901-1940) for sale
US Stamp Prices Scott Catalog 323 - 1c 1904 Louisiana Purchase Exposition
U.S. & Worldwide Stamps & Postal History - May 10-11 2006
323 - 1904 1c Robert R. Livingston - Mystic Stamp Company
Louisiana Unused US Stamps (19th Century) for sale
Raritan Stamps, Inc. Auction #82
327 - 1904 10c Louisiana Commemorative: Map of the Louisiana Purchase - Mystic Stamp Company
Value of US Stamps Scott # 325: 3c 1904 Louisiana Purchase Exposition
323-27 - Complete Set, 1904 Louisiana Purchase - Mystic Stamp Company