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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, documents, financial records, memorabilia, and printed materials. The papers relate to numerous organizations--social, political, civic, and philanthropic--with which he was associated. Among these organizations are Legal Aid Society; Prison Association of New York; Outdoor Recreation League; Socialist Democratic League and National Party; American Alliance for Labor and Democracy; Constitutional Democracy Association; National Security League; YMCA, etc. Included among the papers are his journals and diaries, 1884-1950. An incomplete set of his letterbooks 1905-1960 and some family papers relating to real estate and financial matters