(3fXe GdGfJNGHGJ aj GdYGde haj eUQ (B/s - (3SYGO GdTQbGhj(B.s; (3YHO Gddg fGUas ((3GdbGgQI (B:s (3OGQ GdfgVI GdYQHjI,s, 1984)
. 354-352(3HHdjhLQGajG(B: (3UaMGJ(B.s
(3jTJed Ydi EQLGYGJ HHdjhLQGajI(B.s
(3GdfU HGddZI GdYQHjIs
Keywords: (3GdGfJNGHGJs -- (3eUQs; (3GdbGfhf GdOSJhQjs -- (3eUQs