D. I. · D.W. · D. Walker · I. Walker
Arcadia Publishing · Thunder Bay Press
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Dana Point | 978-0-7385-4732-9 (0-7385-4732-8) | 2007 |
| Orange County:: A Natural History | 978-0-7385-6908-6 (0-7385-6908-9) | 2009 |
| Orange County Then and Now | 978-1-59223-599-5 (1-59223-599-9) | 2006 |