(3eSQMjI GdGfSGf hGdShHQeGf (B/ s - (3HQfGQO Ths; (3eMeO acQi GfhQs ([S.N] : (3GdgjFI GdeUQjI GdYGeI ddcJGH , s, 1984)
Keywords: (3GdGOH GdGfLdjRi GdeJQLes; (3GdeSQMjGJ GdGfLdjRjI GdeJQLeIs