TY  - RPRT
TI  - Arsenic data for streams in the uppper Missouri River Basin, Montana and Wyoming
AU  - J. R. Knapton
AU  - A.A. Horpestad
PY  - 1987
DO  - 10.3133/ofr87124
UR  - https://pubs.usgs.gov/publication/ofr87124
ID  - ofr87124
ER  -