Many of the reference resources include encyclopedias, dictionaries, handbooks, and companion texts. All of these will include bibliographies and other listed resources.
Companion texts are collections of scholarly essays meant to provide an introduction to the scholarship of a subject. Each includes its own bibliography, and each essay in a companion text is by a different scholar in the field. Companion texts will include indexes, as well, and many are available online.
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Cambridge Companions are a series of authoritative guides, written by leading experts, offering lively, accessible introductions to major writers, artists, philosophers, topics, and periods.
Offers peer-reviewed annotated bibliographies on specific topics in a growing range of subject areas. There are at least 50 specific topical bibliographies in each subject area. Each of these features an introduction to the topic. Bibliographies are browseable by subject area and keyword searchable.