TY  - BOOK
AU  - Masland, Richard L
AU  - Sarason, Seymour Bernard
TI  - Mental subnormality: biological, psychological and cultural factors 
AV  - RJ 499 M3
PY  - 1958///
CY  - New York
PB  - Basic Books
KW  - Niños débiles mentales
N1  - Contenido: The prevention of mental subnormality / R. Masland -- Psychological and cultural problems in mental subnormality / S. B. Sarason and T. Gladwin
ER  -