@misc{indiciaed7bc9242a37f,
  title = {Hydrogeologic atlas, Littlestown quadrangle, Carroll County, Maryland},
  author = {J.M. Weigle and J.T. Hilleary},
  year = {1981},
  url = {https://pubs.usgs.gov/publication/70047508},
  note = {Source identifier: 70047508}
}