@misc{indiciae9450a87fea49,
  title = {Preliminary lithogeochemical map showing near-surface rock types in the Chesapeake Bay watershed, Virginia and Maryland},
  author = {John D. Peper and Lucy McCartan and J. Wright Horton and James E. Reddy},
  year = {2001},
  doi = {10.3133/ofr01187},
  url = {https://pubs.usgs.gov/publication/ofr01187},
  note = {Source identifier: ofr01187}
}