@misc{indiciaeda069f34a1ce,
  title = {An inexpensive computer assisted psychometric system.},
  author = {C J Birtles and J Sambrooks and M J MacCulloch and P Holland},
  year = {1972},
  doi = {10.1007/bf02474104},
  url = {https://pubmed.ncbi.nlm.nih.gov/5035358/},
  note = {Source identifier: 5035358}
}