@misc{indiciae6c3fa82d7012,
  title = {Hydrogeologic atlas, Manchester quadrangle, Carroll County, Maryland},
  author = {E. G. Otton and John T. Hilleary},
  year = {1981},
  url = {https://pubs.usgs.gov/publication/70047498},
  note = {Source identifier: 70047498}
}