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.
1930. Iowa. State Planning Board. Committee on Soils Survey. 1 map black line ; 83 x 113 cm Iowa state plan. "Project 1034." "1034-2.". Iowa. State Planning Board.
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. Iowa. State Planning Board. Committee on Land Utilization. 1 map black line ; 84 x 115 cm Negative. "Project 1030." "1030-13.". Iowa. State Planning Board.
1930. Iowa. State Planning Board. Committee on Population Social Trends. 1 map black line ; 84 x 115 cm Negative. "Iowa state plan." "Project 1048." "1048-19.". Iowa. State Planning Board.
1900. Iowa. State Planning Board. Committee on Land Utilization. 1 map black line ; 84 x 115 cm Negative. "Iowa state plan." "Project 1030." "1030-28.". Iowa. State Planning Board.