(3GdYgO GdLOjO (B/ s ((3HjQhJ (B:s (3LeYjI GdcJGH GdebOS aj GdTQb GdCOfi,s, 1973)
(3jhLO efg fSNI aj bGYI GdeWGdYIs
Keywords: (3GdJhQGgs; (3GdYgO GdLOjOs; (3GdcJH GdebOSIs