CLASECLASE is a bibliographic database created in 1975 at the National Autonomous University of Mexico (UNAM). The database is updated daily and more than 10 thousand records are added every year. It offers around 350 thousand bibliographic records of articles, essays, book reviews, bibliographic reviews, brief notes, editorials, biographies, interviews, statistics and other documents published in about 1,500 journals from Latin America and the Caribbean, specialized in social sciences and humanities.