(3JGQjN GdYQGb GdSjGSj GdMOjK (B/ s - (3GdMSfj , YHO GdQRGb s ((3HZOGO (B: s (3OGQ GdTDhf GdKbGajI GdYGeI , s, 1989)
Keywords: (3GdYQGb (B- (3JGQjN s