@misc{indiciaeda01160e126d,
  title = {Definitions of components of the Water Data Sources Directory maintained by the National Water Data Exchange},
  author = {William A. Knecht and Melvin D. Edwards},
  year = {1978},
  doi = {10.3133/ofr77775},
  url = {https://pubs.usgs.gov/publication/ofr77775},
  note = {Source identifier: ofr77775}
}