(3SfG(B: (3eGSGI (B/ s - (3chQfi (B, (3HjjQs; (3Ndjd TQa GdOjfs; (3jhSa eMeO QVGs ([S.N] : (3OGQ GdcJGH GddHfGfi , s, 1970)
Keywords: (3GdeSQM GdaQfSis; (3GdGOH GdaQfSis; (3GdeSQMjGJ GdaQfSjIs