@misc{indiciae69de848b9f0d,
  title = {An empirical determination of the minimum number of measurements needed to estimate the mean random vitrinite reflectance of disseminated organic matter},
  author = {Charles E. Barker and Mark J. Pawlewicz},
  year = {1993},
  doi = {10.1016/0146-6380(93)90050-l},
  url = {https://pubs.usgs.gov/publication/70017362},
  note = {Source identifier: 70017362}
}