The Africana Collection is one of the largest of its kind in the nation with a collection of over 200,000 items. Other significant collections include the G. Robert Vincent Voice Library, the largest academic voice library in the nation, containing a collection of over 40,000 hours of spoken word recordings and includes the voices of over 100,000 persons from all walks of life, and the Russel B. Nye Popular Culture Collections which includes the extensive Comic Art Collection. This collection includes over 100,000 comic books, and 10,000 related books and periodicals. The Turfgrass Information Center is recognized as the most extensive public collection of turfgrass educational material in existence.