Teachers learn about caves on a short course in upstate New York.
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Last Modified: 2012-07-12 16:15:36 Permanent URL: http://serc.carleton.edu/download/images/34440/learning_about_karst.jpg
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July 2012 http://nagt.org/nagt/publications/trenches/issues/jul12.html
Provenance Photo courtesy of John and Joan Mylroie
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