@misc{indiciaeaefb1aaa9c27,
  title = {Perspective on problems of hydrogeology},
  author = {H. E. LeGrand},
  year = {1962},
  doi = {10.1130/0016-7606(1962)73[1147:popoh]2.0.co;2},
  url = {https://pubs.usgs.gov/publication/70220778},
  note = {Source identifier: 70220778}
}