U. S. Government Printing.
1950-
Bulletin / Bureau of Labor Standards
118, 193, 253, 278, 281, 314
November 15, 1948-December 31,1949 , October 1, 1954-October 15, 1956 , October 16, 1956-December 31, 1957 , 1961-1962 , 1963 , 1964 , 1965-1966 , 1967
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