(3GdefJNH ef ZQjH cdGe GdYQH (B/ s - (3cQGY Gdfed(B?(3GHh GdMSf Ydi Hf GdMSf GdgfGFi GdOhSis ((3GdQjGV (B: s (3ehSSI ecI ddWHGYI h GdGYdGe , s, 1989)
Keywords: (3GddZI GdYQHjIs; (3GdHdGZI GdYQHjIs; (3GddZI GdYQHjI (B- (3GdGdaGXs; (3GddZI GdYQHjI (B- (3GdfMhs; (3cQGY Gdfed(B-(3GHh GdMSf Ydi Hf GdMSf GdgfGFi GdOhSis