TY  - RPRT
TI  - Problem solving and strategy production in mentally retarded persons.
AU  - R P Ferretti
PY  - 1989
DO  - 10.1016/0891-4222(89)90026-7
UR  - https://pubmed.ncbi.nlm.nih.gov/2648504/
ID  - 2648504
ER  -