For a list of useful databases see the "Finding Articles" tab. The resources below are great for finding background information on your topic.
Central Library, Reference 4th-flr: NX650 .M9 L494
The LIMC tries to present what we know of the iconography of Greek, Etruscan and Roman mythology as well as of the neighbouring Mediterranean cultures. Each of the illustrated figures of Greek, Etruscan and Roman mythology is discussed in alphabetic order, usually in an individual article of a uniform structure.
Central Library, Reference 6th-flr: ATLAS G1033 .B3 2000
In 99 full-color maps, the atlas recreates the entire world of the Greeks and Romans from the British Isles to the Indian subcontinent and deep into North Africa
Central Stacks 3rd-flr: DG63 .L49 1993
Encyclopedia covering the physical fabric of ancient Rome, both as it survives in archeological remains and as it can be deduced from literary, numismatic, epigraphical, and other sources. Organized alphabetically.