U.S. Embassy in Moscow
http://www.usembassy.ru/

The Consulate General of the U.S. in St.Petersburg
http://www.stpetersburg-usconsulate.ru/

American Councils for International Education in St.Petersburg
http://www.americancouncils.spb.ru/

Information about America from the U.S Department of State International Information Programs
http://usinfo.state.gov/russki/infousa/

The U.S. Library of Congress
http://loc.gov/

Internet-encyclopedia for young adults
http://www.go.grolier.com/