Geological Survey (U.S.)1 map7123754file name: index.cpdbarcode: 31858061346809islandora: sheetmaps_189(OCoLC)808840956https://digital.lib.uiowa.edu/node/84928engU.S. Geological SurveyPublicIowa City and vicinity, Iowa, 1931MapsIowa--Johnson CountyIowa--Iowa CityIowa--CoralvilleIowa1930-1940University of Iowa