Correspondence, speeches, writings, business records, clippings, scrapbooks, and other papers relating primarily to Kobak's work with McGraw-Hill Publishing Co., inc., Mutual Broadcasting System, and National Broadcasting Company; to the early years of radio and television broadcasting; and to Kobak's expertise in the field of public relations and communications. Includes an autobiographical account of the years Kobak spent at McGraw-Hill Publishing Co., inc. Correspondents include Tom C. Clark, Lucius D. Clay, John Conrad, Nicholas J. Conrad, George Vernon Denny, John F. Kennedy, Edgar H. Kobak, Edward J. Mehren, A.C. Neilsen, Adlai E. Stevenson, Harry S. Truman, A.C. Nielsen Company, the National Association of Broadcasters, and S&C Electric Company.