@misc{indiciaefded2b7096df,
  title = {Geologic observations along a pipeline trench in Frederick County, Maryland},
  author = {William E. Davies and G.C. Ohlmacher and Brian Fox},
  year = {1984},
  doi = {10.3133/ofr84386},
  url = {https://pubs.usgs.gov/publication/ofr84386},
  note = {Source identifier: ofr84386}
}