00234nam a22000857a 4500082001600000100002100016245007200037260002600109300001300135 a617.8 THI B aThirumalai, M.S. aSpeech of the hearing impaired /cM.S. Thirumalai and S.G. Gayathri aMysore :bCIIL,c2004 a169 p. :