@misc{indiciaee682208f3e52,
  title = {Geology and mineral resources of the Honeybrook and Phoenixville quadrangles, Pennsylvania},
  author = {Florence Bascom and George W. Stose},
  year = {1938},
  doi = {10.3133/b891},
  url = {https://pubs.usgs.gov/publication/b891},
  note = {Source identifier: b891}
}