Libraries/References
- Penn State University Libraries
- Encyclopedia Britannica Online
- Electronic Text Center -- University of Virginia
- The Internet Public Library
- IPL Youth Division
- National Library of Education
- Library of Congress
- Color Landform Atlas of the United States
- PCL Map Collection
- U.S. Census Bureau
- The World Factbook 1999
- The Virtual Reference Desk
- MSU Vincent Voice Library
- Switchboard
- Mapquest
Last update 1/17/00
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