TY - RPRT TI - Water-resources investigations of the U.S. Geological Survey in Iowa; fiscal year 1981 AU - I. L. Burmeister AU - L.G. Hecht PY - 1981 DO - 10.3133/ofr81349 UR - https://pubs.usgs.gov/publication/ofr81349 ID - ofr81349 ER -