Photograde: Official Photographic Grading Guide for United States Coins, 19th Edition by James F. Ruddy |
The Official Guide to Coin Grading and Counterfeit Detection, Edition #2 by Professional Coin Gradi |
by Kenneth Bressett
|
by Q. David Bowers
|
Collecting and Investing Strategies for United States Gold Coins by Jeff Ambio |
























