If you want to search for a specific topic or concept across various disciplines to get different perspectives try the following online collection of reference books.  For example, do a search on RACE and you will get articles on "race" from reference sources in anthropology, psychology, sociology, biology, etc.  Each of the databases below allow you to filter your results by subject.

Library Catalog

Journal Finder

Citation Guides

Ask a Librarian

Annotated Bibliography

Encyclopedias, Dictionaries, and Other Reference Sources

To get started and to find background information on your topic, use the following reference sources.

There are numerous other specialized  encyclopedias  on classical archaeology, maritime archaeology, Medieval archeology, biblical archeology, archeology  of the Middle East, etc.

To get a list, just do a search in OSCAR, the online catalog with the keywords: archaeology and encyclopedia