Google Books allows you to search Google's collection of digitized books. Some of the books will offer you a preview, which will help you decide it if it useful to your research.
The MLA International Bibliography indexes books, articles and dissertations published on modern languages, literatures, folklore, and linguistics, providing coverage from 1926 to the present.
Full-text academic journals in the arts and sciences published by Johns Hopkins Univ. Press. Note: art coverage can be limited, but photography is very good.
Full text-articles from a wide range of journals in the arts and sciences. TIP: using advanced search, you can limit your search by discipline – Art and Art History.
Search more than 2.4 million entries in the Dissertations Online database. Abstracts are available for all, with full-text, including reference lists, available for more recent theses and dissertations. *please note* Most dissertations are LONG, so please use "print" judiciously.
Provides full text of hundreds of journals, books and other published sources from around the world. Good for non-US resources. The database includes full text for nearly 1,200 journals.
Provides full text for more than 7,000 publications on all academic subjects, including more than 6,000 peer-reviewed journals. You will also find books, reports, etc.