U.S. Dept. of Labor, Bureau of Labor Statistics , For sale by the Superintendent of Documents, U. S. Govt. Print. Off
1969
Bulletin / Bureau of Labor Statistics
no. 1625-15, 1660-16, 1775-13, 3000-40, 3010-48, 3015-55, 3020-41, 3025-46, 3030-39, 3035-40, 3040-34, 3045-31, 3050-23, 3055-38
Sep. 1968 , Aug. 1969 , Aug. 1972 , Aug. 1980 , Aug. 1981 , Aug. 1982 , Aug. 1983 , Aug. 1984 , Aug. 1985 , Aug. 1986 , Aug. 1987 , Aug. 1988 , Aug. 1989 , Aug. 1990
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