TY  - RPRT
TI  - Response variability in retarded children.
AU  - J J Gates
AU  - D L Fixsen
PY  - 1968
DO  - 10.1016/0022-0965(68)90094-5
UR  - https://pubmed.ncbi.nlm.nih.gov/5660726/
ID  - 5660726
ER  -