The Roper Center for Public Opinion Research at the University of Connecticut is "the largest library of public opinion data in the world." Visitors to their Website may search the extensive Roper Center Archive Catalog, the Latin American Survey Data Bank, or the Japanese Survey Data Bank. The catalog and the data banks provide summary information on surveys and studies measuring public opinion on a wide range of social, political, and economic issues. The site also includes organizational information, overviews of recent additions to the Center's data collections, and selected full-text articles from current and back issues of The Public Perspective, a bimonthly review of public opinion and polling information. US political history scholars, both amateur and professional, may want to check out the site's New Data Releases section; it contains data tables tracking presidential job performance ratings, from Franklin Roosevelt to William Clinton, based on data from Gallup public opinion polls.