History of the Northern Dynasties, fifteenth of the 24 dynastic histories 二十四史[Er4 shi2 si4 Shi3], compiled by Li Yanshou 李延壽|李延寿[Li3 Yan2 shou4] in 659 during Tang Dynasty, 100 scrolls
Definitions (Wiktionary)
name
History of the Northern Dynasties (one of the official Chinese historical works in the Twenty-Four Histories canon)