Overviews

Changing America: The United States Population in Transition
USIA Electronic Journal, June 1999
http://usinfo.state.gov/journals/itsv/0699/ijse/ijse0699.htm

Portrait of the USA
United States Information Agency
http://usinfo.state.gov/usa/infousa/facts/factover/homepage.htm

The World Factbook 2000
U.S. Central Intelligence Agency
http://www.odci.gov/cia/publications/factbook/geos/us.html