@misc{indiciaeba5e56d708d8,
  title = {Research instruments: assessing validity.},
  author = {K B Haller},
  doi = {10.1097/00005721-199005000-00018},
  url = {https://pubmed.ncbi.nlm.nih.gov/2113983/},
  note = {Source identifier: 2113983}
}