(3TYQ GdTHGH aj GdLRGFQ (B:s (3Hjf GdhGbY h GdBaGb (B/s - (3MSf, aJM GdHGHs ((3GdLRGFQ (B:s (3GdeDSSI GdhWfjI ddcJGH ,s, 1987)
Keywords: (3GdLRGFQs; (3TYQ GdTHGH s