Reference Sources
The Oxford Classical Dictionary by ISBN: 0198606419Publication Date: 2003-05-01The standard one-volume encyclopedia on ancient Greece and Rome, now in its 3rd revised edition. An excellent ready-reference tool and starting point for further research. Most articles include bibliographies.
Brill's New Pauly by ISBN: 9004122591
Barrington Atlas of the Greek and Roman World by The standard (and most complete) topographical atlas for this time period
