Bibliography

• "National Geographic Magazine,"  February 1983.
• "National Geographic Magazine," January 1990.
• "Your Big Back Yard," June 1988.
• "Your Big Back Yard," April 1984.
• InfoPedia, 1994.
• Compton's Interactive Encyclopedia,1995.
• The Children's Activity Atlas, Belitha Press 1989.
• Matthews, Downs.  Polar Bear Cubs.  Scholastic, 1989.
• My Book of First Facts,  1995.

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