TY - RPRT TI - Lignite drilling during 1979 in Ward, Mountrail, and Divide counties, western North Dakota AU - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey AU - North Dakota Geological Survey PY - 1980 DO - 10.3133/ofr80867 UR - https://pubs.usgs.gov/publication/ofr80867 ID - ofr80867 ER -