TY  - RPRT
TI  - Quality assurance for water-quality activities of the U.S. Geological Survey in Montana
AU  - J. R. Knapton
AU  - D. A. Nimick
PY  - 1991
DO  - 10.3133/ofr91216
UR  - https://pubs.usgs.gov/publication/ofr91216
ID  - ofr91216
ER  -