TY  - BOOK
AU  - Schiefelbusch,Richard L
AU  - Copeland,Ross H
AU  - Smith,James O
TI  - Language and mental retardation: empirical and conceptual considerations 
U1  - 132.2 
PY  - 1967///
CY  - New York
PB  - Holt, Rinehart and Winston
KW  - Children with mental disabilities
KW  - Language
N1  - Includes index
ER  -