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Correspondence, manuscripts, memorabilia, photographs, phonograph and tape recordings, and printed files. Included are Cerf's personal correspondence files, 1929-1945, and the diaries and scrapbooks which he maintained from his school days throughout his active career. The diaries, in date-book format, contain terse notes on Cerf's meetings with authors and friends, on his travels and publishing activities; the scrapbooks contain correspondence and photographs, as well as memorabilia and printed items, and were annotated by Cerf and his wife, Phyllis Fraser Cerf Wagner. Also in the collection are manuscripts and proofs for Cerf's books including "The Laugh's on Me""Treasury of Atrocious Puns""The Sound of Laughter""Stories to Make You Feel Better", and "At Random: the Reminiscences of Bennett Cerf", which was edited by Phyllis Cerf Wagner and Albert Erskine, 1977. The papers also include condolence letters written at the time of Cerf's death, photographs and photo albums,certificates and awards, and miscellaneous printed material, including Random House and Modern Library catalogues. Among the major correspondents are: Truman Capote, Dwight D. Eisenhower, Edna Ferber, Moss Hart, J. Edgar Hoover, Hubert Humphrey, Lyndon B. Johnson, John Lindsay, Joshua Logan, John O'Hara, Jacqueline Onassis, Richard Rodgers, Franklin D. Roosevelt, Gertrude Stein, Adlai Stevenson, Harry Truman, and Robert Penn Warren

Professional and personal files including Armstrong's correspondence with professional associations, other engineers, and friends, his research notes, circuit diagrams, lectures, articles, legal papers, and other related materials. Of his many inventions and developments, the most important are: 1) the regenerative or feedback circuit, 1912, the first amplified radio reception, 2) the superheterodyne circuit, 1918, the basis of modern radio and radar, 3) superregeneration, 1922, a very simple, high-power receiver now used in emergency mobile service, and 4) frequency modulation - FM, 1933, static-free radio reception of high fidelity. More than half the files concern his many lawsuits, primarily with Radio Corporation of America, over infringement of the Armstrong patents. Litigation continued until 1967. Other files deal with his work in the Marcellus Hartley Research Laboratory at Columbia University, 1913-1935, and with the American Expeditionary Forces in France during World War I, his Air Force contracts for communications development, Army research during World War II, the Radio Club of America, the Institute of Radio Engineers, FM development at his radio station at Alpine, N.J., the use of FM in television, his involvement in Federal Communications Commission hearings and legislation, and his work with the Zenith Radio Corporation. Also, letters to H.J. Round

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.