Education Full Text - indexes The Journal of Aesthetics and Visual Arts Research
ERIC - Educational Resources Information Center - indexes a broad range of journals, including Journal of Computer-Assisted Learning and conference proceedings such as the annual Museums and the Web.
Historical Abstracts - the major history journal index, covers many museum issues, indexes Journal of the History of Collections
Newspapers - newspapers are very important for reading exhibition reviews, tracing media coverage of art or artists, popular reception to art and tracing works of art.
Frequently historic newspaper accounts can be primary sources for exhibitions and other reception documentation. Excellent for reading art exhibition reviews. Also good for patronage verification and biographical/obituary accounts. Both these sources are the pdf scan of the actual newspaper.
Times Digital Archive - the Times (London), 1785-1985
New York Times Digital Index - 1851 until three years ago.