B. D. · Paul B. · Paul B. Downing Ph.D. · Paul D.
| title | ISBN-13 | year of publication |
|---|---|---|
| Environmental economics and policy | 978-0-316-19180-7 | 1984 |
| Fly Fishing the Southern Rockies: Small Streams and Wild Places | 978-0-9817336-1-6 | 2016 |
| Opal: Advanced Cutting & Setting | 978-0-9625311-5-6 | 2001 |
| Opal Adventures | 978-0-9625311-3-2 | 1993 |
| Opal Cutting Made Easy | 978-0-9625311-4-9 | 1993 |
| Opal Identification & Value | 978-0-9625311-8-7 | 2002 |
Hachette Book Group USA · Majestic Pr · Majestic Press, Inc.