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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.

Correspondence, manuscripts, contracts, memos., and photographs. The correspondence pertains to the publications of numerous important fiction and non-fiction authors. The files are particularly strong for authors included in two important historical series"The New American Nation" Richard B. Morris and Henry S. Commager, editors; and "The Rise of Modern Europe" William L. Langer, editor. The files of Cass Canfield Sr. contain substantial material on Planned Parenthood and International Planned Parenthood.