@misc{indiciae6296236cf943,
  title = {Response variability in retarded children.},
  author = {J J Gates and D L Fixsen},
  year = {1968},
  doi = {10.1016/0022-0965(68)90094-5},
  url = {https://pubmed.ncbi.nlm.nih.gov/5660726/},
  note = {Source identifier: 5660726}
}