Museum Studies 

Several art journal indexes include museology and collectors and collections magazines.

Art Abstracts/Art Index - the major journal article source for art.  Select either of the two databases and click the other (upper left selection) in order to search comprehensively from 1929

Artbibliographices Modern - just 19th-21st-century art.  Indexes down to essays in exhibition catalogs.  Multi-lingual.

Bibliography of the History of Art - Broadest coverage, before 1970's strong French coverage

Jstor - limit to "Art History" in area content

Education

Museum standards and practices are closely alligned to educational interests.  Museum-practice topics can appear in Education journals.

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.

History

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.

Lexis/Nexis Academic - newspaper articles from the late 1980s onward (depending on the newspaper).  Separate search for European dailies is also excellent.

America's Newspapers - search American newspapers by region of the country or individual newspaper.  Great for seeing how an art show was reviewed in rural America.

Frequently historic newspaper accounts can be primary sources for exhibitions and other reception documentation.  Also good for patronage verification and biographical/obituary accounts.  Both pdf scans of the actual column.

Times Digital Archive - the Times (London), 1785-1985

New York Times Digital Index - 1851 until three years ago.