State Quarter US Coin Errors for sale
State Quarter NGC Certified US Coin Errors for sale
The Official Red Book: A Guide Book of United States Coins Spiral
General Coins, History, Literature
Daniel Frank Sedwick, LLC - Professional Numismatists
Washington: Politician - American Numismatic Association
NGC Coin Price Guide and Values
Fifty State Quarters: Handbook and Coin Album; Complete Collection 1999-2008 [Book]
9 Best Coin Collecting Books (Definitive Ranking)
NGC Coin Price Guide and Values
Seleucid Coins: A Comprehensive Catalogue. Part 1: Seleucus I to Antiochus III - Houghton, Arthur; Lorber, Catharine: 9780970926852 - AbeBooks
C4 Publications – C4 Colonial Coin Collectors Club