00340nam a2200121 a 450000500170000008200160001710000210003324500560005426000240011030000220013463000270015663000350018320251203091200.0  a155.25bMAR  aMartin, Garryd_  aBehaviour modificationbWhat it is and How to do it  aPrentice Hallc1988  a499p.b22cm.cPB.  aBehaviour modification  aPsychology, Applied Psychology