TY - RPRT TI - Current water-resources investigations of the U.S. Geological Survey in North Dakota; fiscal year 1981 AU - Cathy R. Martin AU - Luverne L. Albright PY - 1981 DO - 10.3133/ofr81923 UR - https://pubs.usgs.gov/publication/ofr81923 ID - ofr81923 ER -