@misc{indiciaec2551666d5d8,
  title = {Definitions of components of the Water Data Sources Directory maintained by the National Water Data Exchange},
  author = {Melvin D. Edwards},
  year = {1982},
  doi = {10.3133/ofr82923},
  url = {https://pubs.usgs.gov/publication/ofr82923},
  note = {Source identifier: ofr82923}
}