@misc{indiciae25e0087dabac,
  title = {A study of mail survey method.},
  author = {C A Newland and W E Waters and A P Standford and B G Batchelor},
  year = {1977},
  doi = {10.1093/ije/6.1.65},
  url = {https://pubmed.ncbi.nlm.nih.gov/892969/},
  note = {Source identifier: 892969}
}