@misc{indiciae114076f7206c,
  title = {The National Stream Quality Accounting Network (NASQAN) - Some questions and answers},
  author = {John F. Ficke and Richard O. Hawkinson},
  year = {1975},
  doi = {10.3133/cir719},
  url = {https://pubs.usgs.gov/publication/cir719},
  note = {Source identifier: cir719}
}