@misc{indiciae17b9fe80e158,
  title = {Planning a survey.},
  author = {G Rose and D J Barker},
  year = {1978},
  doi = {10.1136/bmj.2.6145.1142},
  url = {https://pubmed.ncbi.nlm.nih.gov/709270/},
  note = {Source identifier: 709270}
}