| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| Holt People Places and Change, Western World: An Introduction to World Studies | 978-0-03-037647-4 | 2005 | |
| Holt World Geography Today | 978-0-03-064682-9 | 2002 | Robert J. Sager |
| Teacher's Annotated Edition 1985 | 978-0-03-063723-0 | 1985 | |
| World Geography Today | 978-0-03-096795-5 | 1995 | Robert J. Sager |
| World geography today | 978-0-03-063722-3 | 1985 | |
| World Geography Today, Grades 9-12: Holt World Geography Today | 978-0-03-093419-3 | 2008 | |
| World Geography Today, Grades 9-12: World Geography Today | 978-0-03-050968-1 | 2005 | |
D,. H.. · D. M. · David H. · David M. · M. H. · Prof. David M. Helgren