%0 Government Document %0 Online %0 Map %E Valder, Joshua F. %I U.S. Department of the Interior, U.S. Geological Survey %D 2018 %C Reston, Va. %G English %B Scientific investigations map ; %T Delineation of selected lithologic units using airborne electromagnetic data near Cedar Rapids, Iowa %U https://purl.fdlp.gov/GPO/gpo56423