@misc{indiciaeecef633ca54b,
  title = {Unconfined compressive strength on rock samples representative of the types found in Bronx County, New York},
  author = {C.A. Baskerville},
  year = {1987},
  doi = {10.3133/ofr87136},
  url = {https://pubs.usgs.gov/publication/ofr87136},
  note = {Source identifier: ofr87136}
}