(3CUhd GdEKHGJ hELQGAGJg aj GdehGO GdeOfjI aj GdbGfhf GdeUQj ebGQfG HJbfjfGJ SGFQ GdHdGO GdYQHjI (B/s - (3eQbS, SdjeGfs ((3GdbGgQI (B:s (3YGde GdcJH,s, 1981)
(3HjHdjhLQGajI (B: (3U(B. 731-737.s
Keywords: (3GdEKHGJ (B((3bGfhf(B)s -- (3eUQs; (3GdbGfhf GdeOfjs -- (3eUQs; (3GdbGfhf GdeOfjs -- (3GdHdGO GdYQHjIs