To find background information, look in reference books. Some selected titles:
The Contimuum Companion to Twentieth Century Theatre / REF PN 2035 C65 2002
The Oxford Encyclopedia of Theatre & Performance / REF PN 2035 .O94 2003
To find books use IRIS
Search for your topic as a subject or a keyword.
To find articles, these databases will be most useful to you:
Art Full Text
Humanities Full Text
MLA International Bibliography
Literature Resource Center
Academic Search Complete
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