R.B. · R. L · Ralph B. · Ralph Barger
| title | ISBN-13 (ISBN-10) | year of publica- tion |
|---|---|---|
| A Century of Pullman Cars: Alphabetical List | 978-0-89778-061-2 (0-89778-061-2) | 1988 |
| Union Pacific Business Cars 1870-1991: Including Inspection and Instruction Cars | 978-0-89778-281-4 (0-89778-281-X) | 1998 |