@misc{indiciae57b986a138a9,
  title = {Watershed boundaries and digital elevation model of Oklahoma derived from 1:100,000-scale digital topographic maps},
  author = {J. R. Cederstrand and A. H. Rea},
  year = {1995},
  doi = {10.3133/ofr95727},
  url = {https://pubs.usgs.gov/publication/ofr95727},
  note = {Source identifier: ofr95727}
}