| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Project Apollo | 978-0-516-20435-2 (0-516-20435-1) | 1997 | Paul P. Sipiera · Diane M. Sipiera |
| Project Gemini | 978-0-516-20441-3 (0-516-20441-6) | 1997 | Paul P. Sipiera · Diane M. Sipiera |
| Project Mercury | 978-0-516-20443-7 (0-516-20443-2) | 1997 | Paul P. Sipiera · Diane M. Sipiera |