周书zhōu shū释义History of Zhou of the Northern Dynasties, twelfth of the 24 dynastic histories 二十四史[Er4 shi2 si4 Shi3], compiled under Linghu Defen 令狐德棻[Ling2 hu2 De2 fen1] in 636 during Tang Dynasty, 50 scrolls单字详解周zhou书shu