A. R. · P. A. · P. A. Rydberg · P R
| title | ISBN-13 | year of publication |
|---|---|---|
| Flora of Colorado | 978-1-112-32905-0 | 2009 |
| Flora of Rocky Mountains and Adjacent Plains | 978-0-02-851250-1 | 1954 |
| Flora Of The Sand Hills Of Nebraska | 978-1-120-62061-3 | 2009 |
| Key to the Rocky Mountain Flora: Colorado, Utah, Wyoming, Idaho, Montana, Saskatchewan, Alberta, and Parts of Nebraska, South Dakota, North Dakota, and British Columbia | 978-1-112-33080-3 | 2009 |
Cornell University Library · Kessinger Publishing, LLC · Macmillan