| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Earthquakes and Volcanoes Thematic Unit | 978-1-57690-591-3 (1-57690-591-8) | 2000 | Loralyn Radcliffe |
| Months & Seasons Thematic Unit | 978-0-7439-3106-9 (0-7439-3106-8) | 2004 | |
D.C. · Dan Calabrese · Dawn Calvert · Dawn Clifford · Dean Calbreath · Dean Cleaver · Deanna Calvert · Dina Clifford · Dom Colbert · Don Colbert