TY  - RPRT
TI  - Monitoring of changes in quality of ground water
AU  - H. E. LeGrand
PY  - 2006
DO  - 10.1111/j.1745-6584.1968.tb01645.x
UR  - https://pubs.usgs.gov/publication/70221386
ID  - 70221386
ER  -