@misc{indiciaec8ae7742db71,
  title = {Sampling design: Part I.},
  author = {R P Lederman and S Worsham},
  doi = {10.1097/00005721-199411000-00012},
  url = {https://pubmed.ncbi.nlm.nih.gov/7823800/},
  note = {Source identifier: 7823800}
}