The best way to find criticisms may be to find books on the play and/or playwright.
Start in Polar, the ONU library catalog. There will be physical books and ebooks available. If you can't find what you need in Polar, search in OhioLink.
Depending on the play/playwright you may need to search for the title or the playwright.
Finding a clickable subject or author name will help narrow the search.
Look for a criticism of the play or playwright.
Google may be your best friend for finding modern production history.
Wikipedia usually has a production history or selected production history. You can take this and build on it. There also may be references you can use.