TY  - RPRT
TI  - Statistical analyses of surface-water-quality variables in the coal area of southeastern Montana
AU  - J. R. Knapton
AU  - Rodger F. Ferreira
PY  - 1980
DO  - 10.3133/wri8040
UR  - https://pubs.usgs.gov/publication/wri8040
ID  - wri8040
ER  -