TY  - RPRT
TI  - Arsenic in ground water of the United States: occurrence and geochemistry
AU  - Alan H. Welch
AU  - D.B. Westjohn
AU  - Dennis R. Helsel
AU  - Richard B. Wanty
PY  - 2005
DO  - 10.1111/j.1745-6584.2000.tb00251.x
UR  - https://pubs.usgs.gov/publication/70022646
ID  - 70022646
ER  -