Directories of periodicals

Bibliothèque Virtuelle de Périodiques
French-Quebec project indexing several hundreds of reviews and electronic magazines offering their contents online.
http://www.biblio.ntic.org

DARE
Social sciences search engine of the UNESCO resource centre including 11 000 institutions, research centers, specialists and periodicals.
http://www.unesco.org/general/eng/infoserv/db/dare.html

Allacademic.com
Search engine and directory of the research reviews in the world.
http://www.allacademic.com