BLS publications, 1972-77 /
United States.Bureau of Labor Statistics.
Epstein, Rosalie.
Washington : BLS : For sale by the Supt. of Docs., U.S. Govt. Print. Off.,
1978.
"Supplements Bulletin 1749, which provides numerical listings of all BLS bulletins and reports from 1886 to 1971 and subject index from 1915."
United States. Bureau of Labor Statistics
Working class