Student working on a paper for his art history course needed information on a Robert Rauschenberg painting that he'd seen in the Art Museum lately.
We looked for books in the catalog on Rauschenberg (many exist). Both ARTstor and Google Images did not have the exact painting (actually silk screen) but displayed some that were similar. I showed him the Art History subject guide pages, noting the Grove Ency. of Art and Art Fulltext. A brief reference in Google helped us to place the work in the context of the artist's ouevre.