National Archives and Records Administration: Includes useful online NARA resources, including an overview of clues that can be found in the census, how to use NARA's census microfilm catalogs, and the fate of the 1890 census: www.archives.gov/
Christine's Genealogy Website's excellent list on links to online census records for both the U.S. and abroad. Also includes a collection of articles on census-related topics: http://censuslinks.com/
U.S. GenWeb Census Project's (a group of volunteers working together to provide Internet websites for genealogical research in every county and state of the U.S.) transcription of census records: http://www.us-census.org/
