00339nam a2200121Ia 4500008004100000020001800041040003800059100001700097245003800114260003400152300001600186653001500202220119s9999    xx            000 0 und d  a0 12 535602 1  cJayakar Knowledge Resource Centre  aHarson, M Ed 0aProgress in behavior modification  bACDEMIC PRESSaNEW YORKc1976  aXV, 367p p.  aPSYCHOLOGY