TY  - BOOK
AU  - Kiernang C. C.
AU  -  Woodford F. Peter
TI  - Behaviour modification with the severely retarded
T2  - Irrmy study group 8
U1  - SN1,6, L5 
PY  - 1975///
CY  - North
PB  - Holland , Elsevier Excerpta Medica   
KW  - PSYCHOLOGY
ER  -