R.N. · R. Nagel · Rob Nagel, Bridget Travers David E. Newton
| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| Endangered Species | 978-0-7876-7618-6 | 2003 | Sonia Benson |
| Space Exploration Reference Library: Almanac, 2 Volume set | 978-0-7876-9209-4 | 2004 | Sarah Hermsen |
| U-X-L Encyclopedia of Landforms and Other Geologic Features: 3 Volume set | 978-0-7876-7611-7 | 2003 | |
| U.X.L Encyclopedia of Science - 9 Volume set | 978-0-7876-1716-5 | 1997 | David E. Newton · Bridget Travers |
| UXL Encyclopedia of Science | 978-0-7876-5432-0 | 2001 | |
| UXL Encyclopedia of Science | 978-0-7876-1725-7 | 1998 | Bridget Travers David E. Newton (Editor) |