ATSF
| Atchison Topeka & Santa Fe | 3 |
BO
| Baltimore & Ohio | 1 |
CBQ
| Chicago Burlington & Quincy | 1 |
CRIP
| Chicago Rock Island & Pacific | 5 |
KRR
| Kiamichi | 6 |
MKT
| Missouri-Kansas-Texas | 24 |
MP
| Missouri Pacific | 11 |
MV
| MV | 1 |
NYSW
| New York Susquehanna & Western | 1 |
SLSF
| Saint Louis-San Francisco | 1 |
SP
| Southern Pacific | 8 |
TP
| Texas & Pacific | 2 |
UP
| Union Pacific Railroad Company | 5 |