Labor offices in the United States and Canada.
United States. Bureau of Labor Statistics, issuing body.; United States. Division of Labor Standards, issuing body.; United States. Bureau of Labor Standards, issuing body.; United States. Employment Standards Administration. Division of State Employment Standards, issuing body.; United States. Employment Standards Administration. Office of Program Development and Accountability, issuing body.
Washington : United States Government Printing Office Washington : United States Department of Labor, Division of Labor Standards Washington : U.S. Department of Labor, Employment Standards Administration 1972-
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