Stanford's holdings exceed 350,000 volumes on Latin America. The historical strength of the collection has been on 19th and 20th century Mexico and Brazil. Since 1982, Stanford and UC Berkeley have had a cooperative collection agreement, which was extended to include the University of Texas at Austin. The Hoover Institution's coverage of the region dates back to 1919 and exceeds 36,000 titles. Its vast archival collections include more than 6,000 microfilm reels of periodicals and newspapers, materials on peronismo, the Cuban and Nicaraguan revolutions as well as the Spanish Civil War, 1936-1939.