| year of publication | ISBN | author(s) | title |
|---|---|---|---|
| 1996 | 978-0-9653645-0-8 | The Top 100 Morgan Dollar Varieties: The VAM Keys | |
| 1997 | 978-0-9653645-4-6 | Michael S. Fey · Ph.D. · and Jeff Oxman | The Top 100 Morgan Dollar Varieties: The VAM Keys |
| 2009 | 978-0-9653645-5-3 | Michael S. Fey · Ph.D. and Jeff Oxman | The Top 100 Morgan Dollar Varieties: The VAM Keys 4th Edition |