These databases may be useful if you need to find theatre reviews or other theatre news
Credo Reference
Online access to 500+ Encyclopedias, Dictionaries, Biographies, Dictionaries and other reference resources
Oxford Reference Online
Includes entries from The Oxford Companion to the American Musical, The Oxford Companion to American Theatre, The Oxford Companion to Indian Theatre, The Oxford Companion to Theatre and Performance, and The Concise Oxford Companion to the Theatre