(3GNHGQ Ggd GdbQf GdKGfi YTQ (B: s (3JGQjN GdeeGdjc ai GdbGgQI (B/ s - (3YeGO GHhZGRis; (3GdNTGH (B: (3GHhGdMSf GSeGYjd Hf SYO Hf GSeGYjd GdhgHis; (3YHOGdYRjR LeGd GdOjfs ((3GdbGgQI (B: s (3GdYQHi ddfTQ hGdJhRjY , s, 1990)
Keywords: (3eUQs; (3JGQjNs