Iowa. State Planning BoardNegative. "Iowa state plan."1 map : black line ; 83 x 115 cmJPEG2000706112541; MAPG4151_E68_193_I62.jp2islandora: testiadep_1795https://digital.lib.uiowa.edu/node/100750engUniversity of Northern IowaPublicColleges and state instituttions: IowaMapsIowa1930-1940University of Iowa