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Video clips and protocol prepared by the USGS,
National Wildlife Health Center
6006 Schroeder Road
Tel: (608) 270-2400
Video created in 1992, and re-edited and
digitised in 2002
Sound is also available: please ensure your volume settings are turned up.
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there may be a short-cut on your desk-top.
||These "windows media" files should play on the majority of computer
systems. Please email us on firstname.lastname@example.org
if you have problems running this video.