Cent Thomas Jefferson Stamp
Louisiana Postage
Rare Stamps & Postal History of the World - August 6-7, 2019
Numismatic Collectors Series Sale by Spink and Son - Issuu
Scotts #324 US stamps
Daniel Frank Sedwick, LLC Auction #28 - Nov. 17-18, 2020 by Daniel Frank Sedwick, LLC - Issuu
Rare Stamps & Postal History of the World - August 6-7, 2019
Cost of US Stamp Scott Catalogue # 324 - 2c 1904 Louisiana Purchase Exposition
323 - 1904 1c Robert R. Livingston - Mystic Stamp Company
US Stamp Prices Scott Catalog 323 - 1c 1904 Louisiana Purchase Exposition