| title | media type | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|---|
| Cartridges and Firearm Identification | Hardcover | 978-1-4665-0206-2 | 2012 | |
| Exploring Photography | " | 978-1-60525-476-0 | 2011 | Richard J. Walker |
| Exploring Photography | Paperback | 978-1-60525-477-7 | 2011 | " |
| Exploring Photography | Hardcover | 978-1-56637-666-2 | 2000 | " |
| Exploring Photography | Paperback | 978-1-56637-216-9 | 1996 | " |
| Exploring Photography | Hardcover | 978-1-56637-214-5 | 1995 | " |
| Exploring Photography: Workbook | Paperback | 978-1-56637-215-2 | 1996 | " |
| Forensic Aspects of Handguns and Pistols | Hardcover | 978-1-4987-0506-6 | 2024 | |
| Forensic Aspects of Handguns and Pistols | Digital | 978-1-4987-0507-3 | 2017 | |
E. Walker · R. E. · R. Walker · Robert E. · Robert W. · Robert Walker
CRC Press · Goodheart-Willcox · Goodheart-Willcox Pub