TY  - RPRT
TI  - Plans of the U.S.Geological Survey, water resources division for research, investigations, and data collection in ground water
AU  - J. E. Upson
PY  - 2006
DO  - 10.1111/j.1745-6584.1967.tb01244.x
UR  - https://pubs.usgs.gov/publication/70221311
ID  - 70221311
ER  -