- $24.50 Interstate Commerce Commission Railroad Locomotive Rules & Interpretations 1921
- $24.99 1919 Chicago Northwestern Railroad Rule Book US Railroad Admin & 1921 Supplement
- $19.00 1921 The Erie Railroad Regulations for Transportation Explosives
- $42.50 LOT 1921-27 antique 6pc PENNSYLVANIA RAILROAD REGULATION BOOKS eastern region
- $12.50 Schedule Of Regulations And Rates Of Pay (Pennsylvania System) Aug 1, 1921