(3QLGd dge JGQjN (B/ s - (3GSGeI MSfs ((3GdbGgQI (B: s (3OGQ GdGed ddfTQ hGdJhRjY , s, 1998)
Keywords: (3GdMQhH GdUdjHjIs; (3UdGM GdOjf GdGjhHis; (3GdXGgQ HjHQSs; (3GMeO Hf Whdhfs; (3LhgQ GdUbdis; (3eUQ (B- (3JGQjN (B- (3GdYUQ GdaGWei (B( 969-1171 (3e (B)s; (3eUQ (B- (3JGQjN (B- (3YUQ GdeeGdjc (B( 1250-1517 (3e (B)s; (3eUQ (B- (3JGQjN (B- (3GdYUQ GdGjhHi (B( 1171-1250 (3e (B)s