| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Space and Earth Science Testpack Answer Key 3rd Edition | 978-1-59166-312-6 (1-59166-312-1) | 2005 | |
| The Physical World: An Introduction to Physical Science for Christian Schools | 978-1-57924-423-1 (1-57924-423-8) | 2000 | Donovan Hadaway |