U.S. Dept. of Labor, Bureau of Labor Statistics , For sale by the Supt. of Docs., U.S. Govt. Print. Off.
1962-
Bulletin / Bureau of Labor Statistics
no. 1286, 1310, 1346, 1617, 1764, 1804, 1980, 2045, 2081, 2108, 2145, 2181, 2208, 2243, 2271, 2290, 2317
Winter 1959-60 , Winter 1960-61 , Winter 1961-62 , June 1968 , Mar. 1972 , Mar. 1973 , Mar. 1977 , Mar. 1979 , Mar. 1980 , Mar. 1981 , Mar. 1982 , Mar. 1983 , Mar. 1984 , Mar. 1985 , Mar. 1986 , Mar. 1987 , Mar. 1988
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