TY  - BOOK
AU  - Zarkowska,Ewa
AU  - Clements,John
TI  - Problem behaviour in people with severe learning disabilities: a practical guide to a constructional approach 
SN  - 0709930143 :
U1  - 371.9 
PY  - 1988///
CY  - London
PB  - Croom Helm
KW  - Behavior modification
KW  - Learning disabilities
N1  - Includes bibliographical references
ER  -