@misc{indiciaeb2b58e81498b, title = {Development of an 11- and 14-Digit Hydrologic Unit Boundary Layer for the Middle Ohio-Raccoon Basin Using a Geographic Information System}, author = {Hugh L. Nelson and Aimee C. Downs and Steve D. Crabtree and Doug H. Hines}, year = {1997}, doi = {10.3133/ofr97616}, url = {https://pubs.usgs.gov/publication/ofr97616}, note = {Source identifier: ofr97616} }