@misc{indiciae0b354cc7d6af,
  title = {Evaluation of methods for delineating areas that contribute water to wells completed in valley-fill aquifers in Pennsylvania},
  author = {Dennis W. Risser and Thomas M. Madden},
  year = {1994},
  doi = {10.3133/ofr92635},
  url = {https://pubs.usgs.gov/publication/ofr92635},
  note = {Source identifier: ofr92635}
}