@misc{indiciae07ebe07a7074,
  title = {Sampling protocol used at the Cathedral of Learning in Pittsburgh, Pennsylvania},
  author = {E. S. McGee},
  year = {1995},
  doi = {10.3133/ofr95672},
  url = {https://pubs.usgs.gov/publication/ofr95672},
  note = {Source identifier: ofr95672}
}