@misc{indiciae9e6452287d80,
  title = {Directory of assistance centers of the National Water Data Exchange (NAWDEX)},
  author = {Cassandra D. Blackwell},
  year = {1991},
  doi = {10.3133/ofr91507},
  url = {https://pubs.usgs.gov/publication/ofr91507},
  note = {Source identifier: ofr91507}
}