@misc{indiciae9af77a30bf58,
  title = {Field trip guide: 18th Ground-water Short Course, U.S. Geological Survey, Ground Water Branch, Glenwood Springs, Colorado, September 1959},
  author = {Stanley William Lohman},
  year = {1959},
  doi = {10.3133/1727},
  url = {https://pubs.usgs.gov/publication/1727},
  note = {Source identifier: 1727}
}