(3GdfXQjI GdGSdGejI aj GdOhdI (B/ s - (3MGRe GdUYjOjs ([(3ecGf GdfTQ ZjQ eMOO(B] : s [(3GdfGTQ ZjQ eMOO(B](3, s, 1977)
(3jTJed Ydi EQLGYGJ HHdjhLQGajI(B.s
(3GdfU HGddZI GdYQHjIs
Keywords: (3fXQjI GdOhdIs; (3GdfXe GdSjGSjIs; (3GdbGfhf GdOSJhQis