TY - RPRT TI - Mission, goals, and authorities of the U.S. Geological Survey, June 1985 AU - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey PY - 1985 DO - 10.3133/70039547 UR - https://pubs.usgs.gov/publication/70039547 ID - 70039547 ER -