1930. Miller, J. Robert (John Robert), 1913- and Iowa. State Planning Board. Committee on Population and Social Trends. 81 leaves chiefly tables ; 29 cm. Iowa. State Planning Board.
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1930. Iowa. State Planning Board. Committee on Population and Social Trends and Bowen, Howard R. (Howard Rothmann), 1908-1989. 19 pages ; 28 cm. Iowa. State Planning Board.
1930. Porter, Florence Ireland and Iowa. State Planning Board. Committee on Population and Social Trends. 13 leaves ; 29 cm. Iowa. State Planning Board.
1930. Sinn, Eugene and Iowa. State Planning Board. Committee on Population and Social Trends. 44 leaves tables ; 29 cm. Iowa. State Planning Board.
1930. Woolbert, R. L. and Iowa. State Planning Board. Committee on Population and Social Trends. 13 leaves ; 29 cm. Iowa. State Planning Board.