@misc{indiciaea9cd89484bd5,
  title = {Gravel resources in the Patuxent Formation of Cretaceous age in the Beltsville quadrangle, Prince Georges and Montgomery Counties, Maryland},
  author = {C. F. Withington},
  year = {1964},
  doi = {10.3133/70222265},
  url = {https://pubs.usgs.gov/publication/70222265},
  note = {Source identifier: 70222265}
}