Remember that in addition to these subject specific databases, there are several good multidisciplinary databases linked under the "Multidisciplinary" subject heading.
These databases cover periodicals and other sources specificially related to Economics.
The largest bibliographic database dedicated to Economics and openly available on the Internet. Over 325,000 items of research can be browsed or searched, and over 225,000 can be downloaded in full text - some subscriptions required. This site is part of a large volunteer effort to enhance the free dissemination of research in Economics, RePEc. Includes working papers, articles, and software components.