Baltimore: Waverly Press, 1941. First Edition. 8vo. xiv, 183,  pp. 3 folding maps at rear. Bibliography; Index. Blue cloth with gilt lettering. Fine condition. Item #19011
American Council of Learned Societies, Studies in Chinese & Related Civilizations, Number 4. "In this study the primary effort has been directed towards determing the chronological sequence of events as given in the basic annals of the four dynastic histories covering this period: the Sui History (or Book of Sui), the Northern History, and the Old and New T'ang Histories." - Preface.