Wirth teaser Short intro version of the Wirth M&M Magma Chamber Activity video.
File 13531 is a 3.7MB Flash Video Uploaded:
Oct14 08 http://d32ogoqmya1dw8.cloudfront.net/files/NAGTWorkshops/gsa03/activities/wirth_teaser.flv
Provenance John McDaris, Carleton College
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