TY  - RPRT
TI  - A Retrospective Analysis on the Occurrence of Arsenic in Ground-Water Resources of the United States and Limitations in Drinking-Water-Supply Characterizations
AU  - Michael J. Focazio
AU  - Alan H. Welch
AU  - Sharon A. Watkins
AU  - Dennis R. Helsel
AU  - Marilee A. Horn
PY  - 2000
DO  - 10.3133/wri994279
UR  - https://pubs.usgs.gov/publication/wri994279
ID  - wri994279
ER  -