@misc{indiciae4958ba19564d,
  title = {The Richmond and Greenwich slices of the Hamburg klippe in eastern Pennsylvania — Stratigraphy, sedimentology, structure, and plate tectonic implications},
  author = {G. G. Lash and Avery A. Drake},
  year = {1984},
  doi = {10.3133/pp1312},
  url = {https://pubs.usgs.gov/publication/pp1312},
  note = {Source identifier: pp1312}
}