@misc{indiciae577b529dccb0, title = {Implementation plan for the National Water-Quality Assessment Program}, author = {P.P. Leahy and J.S. Rosenshein and D.S. Knopman}, year = {1990}, doi = {10.3133/ofr90174}, url = {https://pubs.usgs.gov/publication/ofr90174}, note = {Source identifier: ofr90174} }