TY  - RPRT
TI  - U.S. Geological Survey National Center, Reston, Virginia
AU  - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey
PY  - 1972
DO  - 10.3133/70039552
UR  - https://pubs.usgs.gov/publication/70039552
ID  - 70039552
ER  -