TY  - RPRT
TI  - User's manual for the National Water Information System of the U.S. Geological Survey; Chapter 2, Water-quality system
AU  - Kerry T. Garcia
AU  - David V. Maddy
AU  - Lari E. Lopp
AU  - D. Lynn Jackson
AU  - Richard H. Coupe
AU  - Terry L. Schertz
PY  - 1997
DO  - 10.3133/ofr97634
UR  - https://pubs.usgs.gov/publication/ofr97634
ID  - ofr97634
ER  -