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The Ephemera collection on Chinese science, technology, law, and society (中国科技法律社会汇集) contains over 800 items published in China, dating from circa 1906 to 2010, with its bulk dating from 1931 to 1981. Materials include pamphlets, handbooks, picture books, posters, lantern slides, literacy flash cards, etc. The subject areas of the materials include science, technology, agriculture, personal hygiene, economy, culture, law, society, and politics, etc. The collection also includes works that reflected social, political, industrial transformation in China.

Correspondence, manuscripts, lectures, notes, diaries, notebooks, reports, financial records, blueprints, photographs, and printed materials of Y.C. James Yen and the IIRR concerned with the development, sharing, and financing innovative methods of teaching, improving agriculture, health and family planning, and education in impoverished villages. Among the cataloged correspondents are: Pearl Buck, William O. Douglas, Nelson Rockefeller, and DeWitt Clinton.