Railroad safety :  hearings before subcommittee, 81st Congress, 1st session, on H.R. 378 and H.R. 530, May 17-June 24, 1949. 

 - [Washington, D.C.],  1949. 
 - iii, 202 p. 
<br/><br/> CRDP Program Historic Shelflist record. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Railroads--Signaling--United States.
<br/><br/><label>Gov. Doc. Class. No.: </label>Y 4.IN 8/4:R 13/48