@misc{indiciaea82b06cc8027,
  title = {Methods for determining the proper spacing of wells in artesian aquifers},
  author = {S.M. Lang},
  year = {1961},
  doi = {10.3133/wsp1545b},
  url = {https://pubs.usgs.gov/publication/wsp1545B},
  note = {Source identifier: wsp1545B}
}