The BLLDB online presents an online version of the key publication Bibliography of Linguistic Literature (BLL), which is published annually by the University Library, Frankfurt am Main. It is a valuable source for linguistics in general, and for English, German and Romance (Italian and Spanish) linguistics in particular. The bibliography includes: journal articles; articles of conference proceedings; monographs; dissertations; and Festschrifts. The BLLDB digitalizes all volumes of the BLL dating back to 1971, thereby making available some 354,000 citations. The database is updated quarterly and around 10,000 citations are added per year. Detailed instructions on how to use and search the database and a history of the project are given. Users can browse an index of journals and publications by type, for example: research projects; newsletters; linguistic institutions; history of linguistics; and countries/regions. The site is in English and German. This resource is extremely useful for scholars of linguistics as a means of locating secondary sources.