1. CARTER Thomas Francis: The invention of printing in China and its spread westward. Rev. ed., New York, Columbia Univ. Press, 1931.
2. CHI-K'AN: 書館學季列 (Library Science Quarterly), vol. 3. Peiping, ed. Chines. Bibliothekarverein, 1929.
3. CHIANG-SU: 江蔴省立圃舉岡普館圖杏總史部. Nanking, The Sino-logical Library, 1934.
4. GILES Lionel: An alphabetical index to the Chinese Encyclopedia Ch'in Ting Ku Chin T'u Shu Chi Ch'eng. London, British Museum, 1911.