@misc{indiciae217eca727edd,
  title = {Ground-water activities of the U.S. Geological Survey; an overview},
  author = {E.P. Patten},
  year = {1988},
  doi = {10.3133/ofr88113},
  url = {https://pubs.usgs.gov/publication/ofr88113},
  note = {Source identifier: ofr88113}
}