@misc{indiciae5642768379db,
  title = {Petrographic study of some Lisburne limestone samples, 1948},
  author = {George Gryc},
  year = {1954},
  doi = {10.3133/ofr54104},
  url = {https://pubs.usgs.gov/publication/ofr54104},
  note = {Source identifier: ofr54104}
}