@misc{indiciaef0a873dd7de1,
  title = {Nomenclature of lower ordovician rocks of Washington County, Maryland},
  author = {William Jasper Sando},
  year = {1956},
  doi = {10.1130/0016-7606(1956)67[935:noloro]2.0.co;2},
  url = {https://pubs.usgs.gov/publication/70216238},
  note = {Source identifier: 70216238}
}