D.C. · David C. · David Callihan M.S.
| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| CLEP Natural Sciences | 978-0-7386-0464-0 (0-7386-0464-X) | 2009 | Laurie Ann Callihan |
| CLEP Natural Sciences with CD-ROM | 978-0-7386-0465-7 (0-7386-0465-8) | 2009 | " |
| CLEP Natural Sciences W/Online Practice Tests | 978-0-7386-1094-8 (0-7386-1094-1) | 2013 | " |