prepared by the Commodity Exchange Administration
U.S. G.P.O.
1931-
Statistical bulletin / United States Department of Agriculture
1921-29 : no.34, 1930-33 : no.43, 1933-35 : no.55, 1939-39 : no.74
1921-1929 , 1930-1932 , 1933-1935 , 1936-1939
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