@misc{indiciae1abaa9ca397f, title = {The National Water-Quality Assessment Program: Example of study unit design for the Apalachicola-Chattahoochee-Flint River basin in Georgia, Alabama, and Florida, 1991-97}, author = {David J. Wangsness}, year = {1997}, doi = {10.3133/ofr9748}, url = {https://pubs.usgs.gov/publication/ofr9748}, note = {Source identifier: ofr9748} }