also: きゅうとうじょ
noun
Old Book of Tang
A 10th-century Chinese historical work covering the Tang dynasty; used in academic and historical contexts.
旧唐書は唐代の歴史を記した重要な史料です。
The Old Book of Tang is an important historical source that records the history of the Tang dynasty.
The New Book of Tang, compiled later in the 11th century, which revised and supplemented the Old Book of Tang.
From Chinese 舊唐書／旧唐书 (Jiù Tángshū), literally 'Old Tang Book'. The Japanese reading くとうじょ uses the go-on reading for 旧, while きゅうとうじょ uses the kan-on reading.