TY  - BOOK
ED  - United States.
TI  - Railroad safety: supplemental hearings, 81st Congress, 1st session, on H.R. 378, H.R. 530, Aug. 4-9, 1949
PY  - 1949///
CY  - [Washington, D.C.]
KW  - Railroads
KW  - Signaling
KW  - United States
N1  - Distribution made by issuing office; CRDP Program Historic Shelflist record
ER  -