W H · William F. Helmer · William H. · William J. Helmer
| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| The Complete Public Enemy Almanac: New Facts and Features on the People, Places, and Events of the Gangster and Outlaw Era, 1920-1940 | 978-1-58182-524-4 (1-58182-524-2) | 2007 | Rick Mattix |
| The Complete Public Enemy Almanac: New Facts and Features on the People, Places, and Events of the Gangsters and Outlaw Era, 1920-1940 | 978-1-58182-506-0 (1-58182-506-4) | 2007 | " |