(3GdhSjW ai TQM bGfhf GdGSdMI hGdPNGFQ hGdJTQO (B/ s - (3eYhV YHOGdJhGHs ([S.N] : (3efTGI GdeYGQa GdGSdGejI , s, 1990)
Keywords: (3GdbGfhfs; (3GdJTQOs; (3GdbfGHds; (3GdeJTQOhfs