The Robert O. Lankenau Collection consists of 44 boxes; the dates range from the 1930s to the 1990s. The collection covers a broad range of subjects such as awards, bylaws and constitution, convention details, correspondence, various reports, notes, Minutes, Newspaper clippings, memos, letters, and numerous other documents pertaining to running associations (Ohio Association of the Deaf, National Association of the Deaf and Telecommunications for the Deaf Inc. Overall, this collection provides a rich and insightful history of the establishment of Deaf Organizations in the United States.