(3abg GdJYGed GdeGdi hGdeUQai GdMOjK (B/s - (3eMeO GdTMGJ GdLfOis ((3GdbGgQ (B:s (3OGQ GdfgVI GdYQHjI,s, 1989)
(3jTJed Ydi EQLGYGJ HHjdhLQGajI(B.s
(3HHjdhLQGajG(B: (3UaMI (B282.s
(3GdfU HGddZI GdYQHjIs
Keywords: (3GdeYGedGJ GdTQYjIs -- (3GdHfhc GdESdGejIs