Iowa. State Planning Board. Water Resources Committee1 map black line, hand colored ; 83 x 114 cmW.P.A. project no. 962. "Iowa state plan."JPEGui:testiadep_1775engIowa. State Planning BoardPublicDes Moines-Skunk River basins showing location of basins with respect to state principal drainage lines within areaMapsIowa1930-1940University of Iowa