Gujin tushu jicheng. 古今圖書集成 Nei-fu, Beijing, 1726- 1728. First edition, printed in copper movable type. The great Imperial Encyclopaedia 'Gujin tushu

Gujin tushu jicheng. 古今圖書集成 Nei-fu, Beijing, 1726- 1728. First edition, printed in copper movable type. The great Imperial Encyclopaedia 'Gujin tushu