TY  - BOOK
AU  - Ewa Zarkowska and John Clements
TI  - Problem behaviour in people with severe learning disabilities : a practical guide to a constructional approach
SN  - 0-7099-3014-3
U1  - 371.917 Zar/Cle 
PY  - 1988///
CY  - Croom Helm, London
ER  -