The database OLC-SSG Book Studies, Library and Information Sciences is a subject-related excerpt of the Swets database Online Contents, which is continuously supplemented by selected journal titles of the Bayerische Staatsbibliothek as library in charge of the special collection field.  The database catalogues tables of contents of periodicals belonging to the special collection field. Currently 901 periodical titles are being evaluated retrospectively, up to the year of publication 1993.