00437nam a22001097a 4500082001800000100002100018245013300039260007600172300001100248650004500259650002300304  a616.858 8 SUB  aSubba Rao, T. A.  aManual on developing communication skills in mentally retarded persons :ba UNICEF supported research project /cT. A. Subba Rao  aSecunderabad :bNational Institute for the Mentally Handicapped,c1992.  a381 p.  aCommunication skillsvMental retardation  aMental retardation