TY - BOOK ED - United States. TI - Railroad safety: hearings before subcommittee, 81st Congress, 1st session, on H.R. 378 and H.R. 530, May 17-June 24, 1949 PY - 1949/// CY - [Washington, D.C.] KW - Railroads KW - Signaling KW - United States N1 - CRDP Program Historic Shelflist record ER -