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Correspondence, memoranda, manuscripts, documents, photographs and printed materials relating primarily to Coykendall's various involvements with Columbia University, including the Trustees, University Patents, the Columbia University Press, alumni affairs, and the searches for successors to Presidents Butler and Eisenhower. Also, material relating to his membership in the New York State Historical Association. Among the major correspondents are Nicholas Murray Butler, Marcellus Hartley Dodge, Dwight David Eisenhower, Hellmut Lehmann-Haupt, Arthur Hays Sulzberger, Mark Van Doren, and Thomas J. Watson. Also, memorabilia relating to Coykendall's association with the University and the Press.

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.