Chronicling America is a Website providing access to information about historic newspapers and select digitized newspaper pages, and is produced by the National Digital Newspaper Program (NDNP). NDNP, a partnership between the National Endowment for the Humanities (NEH) and the Library of Congress (LC), is a long-term effort to develop an Internet-based, searchable database of U.S. newspapers with descriptive information and select digitization of historic pages. Supported by NEH, this rich digital resource will be developed and permanently maintained at the Library of Congress.
CLASS is a bibliographic database created in 1975 at the National Autonomous University of Mexico (UNAM). The database is updated daily and more than 10,000 records are added each year. It offers about 350 000 bibliographic records of articles, essays, book reviews, literature reviews, short notes, editorials, biographies, interviews, statistics and other documents published in about 1500 journals from Latin America and the Caribbean, specializing in social sciences and humanities.