This image is a work of a Works Progress Administration employee, taken or made during the course of an employee's official duties. As a work of the U.S. federal government, the image is in the public domain.
One of the key places to begin if you want to trace the entire "life" of a play is with The New York Times Theatre Index,
Is another great source,
If you seek information about British plays or plays performed in Britain, you can find reviews in the London Theater Record, PN 2596.16 L66.
For other European shows see:
To find reviews of foreign plays you will most likely need to go to databases and the web. Remember to try Lexis/Nexis and Factiva. The database Performing Arts Periodicals Database, will have some reviews, but you may want to use international search engines. A link to these is provided on my Theatre and Performance Studies Guide.