Estimates and projections of the labor force and civilian employment in the U.S.S.R., 1950-1975
by Ritchie H. Reed
(International population reports, ser. P-91,
U.S. Dept. of Commerce, Bureau of the Census ; [For sale by the Superintendent of Documents, U.S. G.P.O., 1967
Bibliography: p. 37-39
U.S. Department of Commerce, Bureau of the Census