R. Gabler · Robert E. Gabler · Robert G.
| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Essentials of Physical Geography | 978-0-03-022909-1 (0-03-022909-X) | 1998 | Robert E. Gabler · Robert Sager · Daniel Wise · James F. Petersen |
| Human Geography Interactive Workbook | 978-0-03-043782-3 (0-03-043782-2) | 1999 | Ronald E. Nelson · James W. Vining |