Holt McDougal · Wadsworth; Brooks/Cole
| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Essentials of Physical Geography | 978-0-495-01194-1 (0-495-01194-0) | 2006 | Robert E. Gabler · James F. Petersen |
| Essentials of Physical Geography | 978-0-03-033822-9 (0-03-033822-0) | 2003 | Robert E. Gabler · James F. Petersen |
| Essentials of Physical Gogoraphy | 978-0-495-11004-0 (0-495-11004-3) | 2006 | Robert E. Gabler · James F. Petersen |