Gem Guides Book Co · Sylvanite, Inc
| title | ISBN-13 | year of publication |
|---|---|---|
| Placer Gold Deposits of Arizona | 978-0-9843698-4-3 | 2010 |
| Placer Gold Deposits of Arizona | 978-0-935182-33-0 | 1987 |
| Placer Gold Deposits of Nevada | 978-0-89632-010-9 | 2011 |
| Placer Gold Deposits of Nevada | 978-0-9843698-9-8 | 2011 |
G J · G. Johnson · M G*** · M J · M. Johnson · Maureen Johnson