@misc{indiciaea874e24158e2,
  title = {Geochemical data for Jurassic diabase associated with early Mesozoic basins in the eastern United States: Gettysburg basin and vicinity, Pennsylvania and Maryland},
  author = {David Gottfried and Albert J. Froelich and J. N. Grossman},
  year = {1991},
  doi = {10.3133/ofr91322e},
  url = {https://pubs.usgs.gov/publication/ofr91322E},
  note = {Source identifier: ofr91322E}
}