@misc{indiciaea45477b23dd9,
  title = {Preparation of average annual runoff map of the United States, 1951-80},
  author = {W.R. Krug and W.A. Gebert and D.J. Graczyk},
  year = {1989},
  doi = {10.3133/ofr87535},
  url = {https://pubs.usgs.gov/publication/ofr87535},
  note = {Source identifier: ofr87535}
}