Providing information on East-Central Europe, Russia, Soviet Union and the former Soviet republics, with a vast collection of indexed sources published in the United States, Canada and some European countries.

Published by the Société Internationale de Bibliographie Classique, it's a specialized bibliographic database of scholarly works relating to all aspects of Ancient Greek and Roman civilizations.

The Biographisch-Bibliographisches Kirchenlexikon (BBKL) is a German biographical encyclopedia related to the history of the Church, founded 1975 by Friedrich Wilhelm Bautz. It contains more than 20,000 biographical articles with bibliographies of the person’s work and selected secondary readings.

Oxford Bibliographies in Sociology offers exclusive, authoritative research guides that combine the best features of an annotated bibliography and a high-level encyclopedia.

Offers peer-reviewed annotated bibliographies on African studies. 

A searchable database created from the results of an annual magazine that lists and records, with high scientific level criteria, everything that is published in the world, in books and scientific journals in the field of Italian language and literature.