 This database ceased in the decade of the nineties.Currently, the databases described above are produced by the Department of Latin-American Bibliography, part of the Assistant Office for Information Services of the General Directorate for Libraries (DGB) of the National Autonomous University of Mexico (UNAM).The original databases (BLAT, CLASE, PERIODICA, MEXINV and Latindex) were created by the Science and Humanities Information Center (CICH).