(3eaOj RcQjG TGYQ eLO KhQI (B/s - (3Hf YHO Gddg , HdbGSe s ((3GdLRGFQ (B:s (3GdeDSSI GdhWfjI ddcJGH ,s, 1990)
Keywords: (3eLO s; (3RcQjGs; (3TGYQs; (3eaOj s