TY  - RPRT
TI  - Implementation plan for the National Water-Quality Assessment Program
AU  - P.P. Leahy
AU  - J.S. Rosenshein
AU  - D.S. Knopman
PY  - 1990
DO  - 10.3133/ofr90174
UR  - https://pubs.usgs.gov/publication/ofr90174
ID  - ofr90174
ER  -