The "Système Universitaire de Documentation" (Sudoc) catalogue is a French collective catalogue created by Higher Educational and Research libraries and resource centres. There are nearly 10 million bibliographic records in this catalogue describing all kinds of document (books, dissertations, reviews, electronic resources, audio-visual documents, microfiches, maps, scores, manuscripts and very old books.)
Sudoc also catalogues the series collections of periodicals held by around 2000 non-Higher Educational library institutions (such as Town Libraries, other resource centres, etc.).
Lastly, Sudocs mission is to list all dissertations/theses produced in France.