@misc{indiciaeb396fa705d5d,
  title = {Littlestown quadrangle, Carroll County, Maryland hydrogeologic atlas},
  author = {James Montgomery Weigle and John T. Hilleary},
  year = {1981},
  doi = {10.3133/ofr801015},
  url = {https://pubs.usgs.gov/publication/ofr801015},
  note = {Source identifier: ofr801015}
}