00355nam a22000857a 4500100002200000245012700022260007600149300001100225650003300236  aPeshawaria, Reeta  aBehavioural approach in teaching mentally retarded children :ba manual for teachers /cReeta Peshawaria and S. Venkatesan  aSecunderabad :bNational Institute for the Mentally Handicapped,c1992.  a264 p.  aMental retardationvChildren