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Letters, documents, clippings, and printed matter related to the work of the Citizens Union of New York, including correspondence, memoranda, and reports which survey, analyze, and criticize bills introduced in the state legislature and city council; 244 boxes of "Who's Who" biographies of candidates for city and state offices; files of campaign and election materials; records of affiliated "good government" organizations in New York City; and extensive financial records.

This collection contains the correspondence, minutes and subject files of the Columbia College Alumni Association.

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

Wesley McCune founded Group Research Inc. in 1962 after a successful career as a journalist for such magazines as "Newsweek", "Time", "Life", and "Changing Times. Group Research Inc. was based in Washington DC until ceasing operations in the mid-1990s. The organization collected materials that focus on the right-wing and span four decades. The archive includes information about and by right-wing organizations and activists in the form of publications, correspondence, pamphlets, reports, the newspaper "Congressional Record," and magazine clippings and other ephemera. McCune and his small staff also published an initially bi-monthly but in later years monthly newsletter Group Research Report which kept its subscribers abreast of the latest views and actions of right-wingers.

The collection consists of speeches, reports, publications, research notes, and correspondence. The bulk of the collection relates to Wu's involvement in the American Physical Society as well as her research activities. The correspondence is chiefly professional, relating to C. S. Wu's physics research, professional commitments, appointments, meetings, conferences, and publications. Correspondence also includes letters from individuals around the world praising Wu for her accomplishments, asking advice, arranging speaking engagements, discussing administrative matters, and trading research notes, as well as information on publications and other topics. In addition, the collection contains information on Wu's involvement in the development of an affirmative action program at Columbia University in the 1970's.

Robert M. Morgenthau (1919-2019) served as the District Attorney for New York County (the borough of Manhattan) for 35 years (1974-2009) and made a reputation for prosecuting white-collar crime. In this regard, the Papers hold many research files covering such aspects of white-collar crime as money laundering, offshore banking and tax havens. Morgenthau rarely handled a case himself. He delegated prosecutions to key aides in his office of 500 lawyers. Although not comprehensive, the Papers do contain a few files of assignment sheets covering the period (1938-2008). These sheets indicate which bureau each Assistant District Attorney was assigned to each month. The Papers, in turn, do not have any employment information about individual lawyers or the specific cases they worked on while employed in the Manhattan District Attorney's Office under Morgenthau. However, researchers should review "Series VI: Press Releases" and "Series VIII: Statements and Testimonies before Local, State and National Governmental Bodies," in order to gain an understanding of the issues handled by the Manhattan DA office during Robert Morgenthau's tenure.