(3GdJbOjQ aj GdVQGFH (B: s (3WQb JbOjQ GdCQHGM aj GdCfTWI GdJLGQjI (B- (3GdUfGYjI (B- (3Gdegf GdMQI (B/ s - (3egQGf, eMeO aQjOs ((3GdbGgQg (B:s, 1991)
Keywords: (3GdeMGSHIs; (3eMGSHI GdVQGFHs