Digital Library of Georgia is a gateway to Georgia's history and culture found in digitized books, manuscripts, photographs, government documents, newspapers, maps, audio, video, and other resources. Included is the New Georgia Encyclopedia, an authoritative source of information about people, places, events, institutions, and many other topics relating to the state
Global Atlanta has a quick page for links to local governments and other info.
SOURCES FOR STATE AND LOCAL GOVERNMENT INFORMATION
Note that the information in many blue books is now available online, but most information pre-1997 is still only available in print.
This is the "official nonpartisan organization of the nation's ... cities with populations of 30,000 or more." The site provides news, and describes key programs and provides publications in areas such as sustainable development, working families, and homelessness and hunger. Also includes a best practices database and links to websites of member cities.
Tip: Locate other think tanks at Harvard Kennedy School's Think Tank Search
The following website from the N.Y. Times is not specific to local urban issues but contains many useful links.