R.R. · Robert R. · Robert R. Van Ryzin · Robert V.
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Fascinating Facts, Myths and Mysteries About U.S. Coins: Fascinating Facts, Mysteries and Myths | 978-1-4402-0650-4 (1-4402-0650-3) | 2009 |
| Us Coins Close Up: Tips to Identifying Valuable Types & Varieties. Robert R. Vanryzin | 978-1-4402-2983-1 (1-4402-2983-X) | 2012 |