@misc{indiciaeb81578031040,
  title = {Carbonate rocks of Cambrian and Ordovician age in the Lancaster quadrangle, Pennsylvania},
  author = {Harold Meisler and Albert E. Becher},
  year = {1968},
  doi = {10.3133/b1254g},
  url = {https://pubs.usgs.gov/publication/b1254G},
  note = {Source identifier: b1254G}
}