@misc{indiciae69d7591b0248,
  title = {Regional ground-water flow concepts in the United States: Historical perspective},
  author = {J.D. Bredehoeft and W. Back and B.B. Hanshaw},
  year = {1982},
  doi = {10.1130/spe189-p295},
  url = {https://pubs.usgs.gov/publication/70188843},
  note = {Source identifier: 70188843}
}