(3GdehWC (B: s (3QhGjI jMji Hf jMji GddjKj aj OQGSI ebGQfI eY abg GdEeGe CMeO Hf MfHd (B/ s - (3CfS, eGdc Hfs; (3GddMGe, SYjOs ((3HjQhJ (B:s (3OGQ GdacQ ddfTQ h GdJhRjY,s, 1989)
Keywords: (3GdOjf GdESdGejs; (3GdMOjK GdfHhjs