@misc{indiciae6b120ea3bb7f,
  title = {Selected procedures for biological and microbiological investigations},
  author = {K. V. Slack},
  year = {1971},
  doi = {10.3133/ofr71265},
  url = {https://pubs.usgs.gov/publication/ofr71265},
  note = {Source identifier: ofr71265}
}