@misc{indiciae7c8289f7f48d,
  title = {Development of an 11- and 14-digit hydrologic unit boundary layer for the Lower Ohio-Salt River 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/ofr97614},
  url = {https://pubs.usgs.gov/publication/ofr97614},
  note = {Source identifier: ofr97614}
}