@misc{indiciaecc71871c9f1f,
  title = {Field trip guidebook for hydrogeology of the Twin Cities Artesian Basin},
  author = {T. C. Winter and R.F. Norvitch},
  year = {1972},
  url = {https://pubs.usgs.gov/publication/70175803},
  note = {Source identifier: 70175803}
}