Library of Congress: Classification of Chinese books based on the Imperial Catalogue Ssu k’u ch’üan shu tsung mu 四庫全書總目. Completed 1772-1782, by Chi Yün 紀昀 and a Commission of Scholars under the Supervision of the Emperor Ch’ien Lung. Prepared and photographed in the Office of the Chairman of the Library Committee, U.S. Department of Agriculture. Washington D.C. November, 1916. Revised March 1922).
- Digitized: Internet Archive (digitizing sponsor: MSN; book contributor: Cornell University Library)
- No copy listed in Wiener China-Bibliographie