@misc{indiciae0bc55f2a1467, title = {Geological Survey research, fiscal year 1981}, author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey}, year = {1984}, doi = {10.3133/pp1375}, url = {https://pubs.usgs.gov/publication/pp1375}, note = {Source identifier: pp1375} }