United States. Bureau of Labor Statistics. (1972). Railroad technology and manpower in the 1970's. Govt. Pr..
Chicago Style (17th ed.) CitationUnited States. Bureau of Labor Statistics. Railroad Technology and Manpower in the 1970's. Wash.: Govt. Pr., 1972.
MLA (8th ed.) CitationUnited States. Bureau of Labor Statistics. Railroad Technology and Manpower in the 1970's. Govt. Pr., 1972.
Warning: These citations may not always be 100% accurate.