(3bQjI SYjQ (B: s (3OQGSI ejOGfjg (B/ s - (3QGHWI GdLGeYjjf (B- (3eQcR GdCHMGKs ((3YeGf (B:s (3QGHWI GdLGeYjjf (B- (3eQcR GdGHMGK,s, 1990)
Keywords: (3JGQjN adSWjfs; (3GdNdjds