JSTOR is a fully-searchable database containing the full text of back issues of several hundred scholarly journals in the humanities, social sciences, mathematics, music, ecology and botany, business and other fields. JSTOR also offers high-resolution digital copies of many illustrations, charts, and tables that were published in those scholarly journal articles. JSTOR allows image searching through caption text searching.
EBSCOHost offers an Image Search
Entertainment Industry Magazine Archive's advance search options include Advertisement, Editorial Cartoon/Comic, Photograph, etc.
The Adler Hip Hop Archive: newspaper and magazine articles, recording industry press releases and artist bios, correspondence, photographs, posters, flyers, advertising, and other documents compiled by Bill Adler
Hip hop party and event flyers. Part of the Cornell Hip Hop Collection; features more than 500 party and event flyers ca. 1977-1984.
St. James encyclopedia of popular culture: advance search allows searching image captions. Also provides extensive list of illustrations, which are numerous.