TY  - RPRT
TI  - Quality assessment program and results for the NAWQA surface water pilot studies
AU  - R. F. Sanzolone
AU  - J. L. Ryder
PY  - 1989
DO  - 10.3133/ofr89658
UR  - https://pubs.usgs.gov/publication/ofr89658
ID  - ofr89658
ER  -