Use NewsBank and other newspaper sources to find reviews of plays outside of New York City. For New York City play reviews, for the most recent 365 days, go to the New York Times and type in the name of the play. You can go to Lexis-Nexis to get the full text of the New York Times for the last 20 years. This index goes all the way back to 1851. These volumes reprint the full text of the reviews from the New York Times.
Arrangement is chronological.
A separate index volume covering 1920-1970 makes it easy to find a review when you don't know its date. Another convenient way to find a reviews of plays in New York City is to consult the New York Theatre Critics' Reviews from 1940-present. If you do not find a play review in the above resources you might try other indexes to general periodicals, such as Readers' Guide Abstracts or Lexis-Nexis .