TY  - BOOK
AU  - Burt,Cyril
TI  - The Causes and Treatment of Backwardness.  
U1  - 371.92  
PY  - 1957///
CY  - London
PB  - University Of London Press
KW  - Special Education
KW  - Students with Mental Disabilities
N1  - Includes references and index
ER  -