@misc{indiciae9a80c9bdc52e,
  title = {Area sampling methods: selecting the proper sites.},
  author = {P L Williams and M T Luster and P J Middendorf},
  year = {1983},
  url = {https://pubmed.ncbi.nlm.nih.gov/6877723/},
  note = {Source identifier: 6877723}
}