1930. Iowa. State Planning Board. 1 map ; black line; 59 x 86 cm Negative. Iowa. State Planning Board.
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1930. Iowa. State Planning Board. 1 map ; black line; 59 x 87 cm Oriented with north to the left.; Negative.; Inlcudes location map. Iowa. State Planning Board.
1930. Iowa. State Planning Board. 1 map ; black line; 59 x 87 cm Oriented with north to the left.; Negative.; Inlcudes location map. Iowa. State Planning Board.
1930. Iowa. State Planning Board. 1 map ; black line; 58 x 86 cm Negative.; Includes location map. Iowa. State Planning Board.
1930. Iowa. State Planning Board. 1 map ; black line, plastic; on sheet 55 x 151 cm Oriented with north to the right. Iowa. State Planning Board.
1930. Iowa. State Planning Board. 1 volume (no pagination) ; 22 cm. Iowa. State Planning Board.
1930. Iowa. State Planning Board and Iowa State Conservation Commission. Biological Survey Unit. 20 leaves illustrations ; 29 cm. Iowa. State Planning Board.
1920. Iowa. State Planning Board. 1 map black line ; 84 x 115 cm Negative. "Iowa state plan." "Project 1030." "1030-16.". Iowa. State Planning Board.
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