@misc{indiciae7effc3d534f8,
  title = {Ground-water supply at the Letterkenny Ordnance Depot, Chambersburg, Pennsylvania},
  author = {J.B. Graham and R.C. Stephenson},
  year = {1949},
  doi = {10.3133/ofr4974},
  url = {https://pubs.usgs.gov/publication/ofr4974},
  note = {Source identifier: ofr4974}
}