Oxford Bibliographies Online offers research guides on a wide variety of subjects that combine features of annotated bibliographies and subject-specific high-level encyclopedias. Summarizes main discussion areas within a particular topic and provides contextual citations to key works.
MSU Libraries purchase a continuing stream of handbooks and encyclopedias. They provide authoritative overviews and resource lists on specific topics and are heavily used. Handbooks, in particular, distill current areas of interest and make recommendations for future research.