(3JUeje fXe GdJOQjH hGdJWhjQ (B/ s - (3JQjS, hdjes; (3SYO GMeO GdLHGdis; (3SYjO Ydi GdThGas ((3GdSYhOjI (B: s (3eYgO GdGOGQI GdYGeI , s, 1990)
Keywords: (3GdGOGQIs; (3GdJfXjes; (3JOQjHs; (3GOGQI GdGaQGOs; (3GdJfejI GdGOGQjIs; (3GdGOGQjhfs