TY  - RPRT
TI  - Titration and double responding as techniques promoting proficient learning in retardates.
AU  - R A Wunderlich
PY  - 1971
DO  - 10.1016/0022-0965(71)90025-7
UR  - https://pubmed.ncbi.nlm.nih.gov/5001617/
ID  - 5001617
ER  -