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Discusses the causes of erosion and effects on the earth. Contains in-class activity to show how various rocks withstand erosion. Includes teacher's guide.
GPN Educational Media, Box 80669, Lincoln, NE 68501-0669, Phone: (402)472-2007, Toll-free: 800-228-4630, Fax: (800)306-2330, URL: http://gpn.unl.edu, Remarks: Formerly: Great Plains National.
Available on VHS
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