(3WQb GdHMK GdYdej aj GdJGQjN h GdBKGQ (B/ s - (3HGbQ, Wgs ((3HZOGO (B:s (3hRGQI GdJYdje GdYGdj h GdHMK GdYdej,s, 1980)
Keywords: (3Yde GdJGQjNs; (3GdJGQjNs; (3GdBKGQs