The US National Park Service publishes what they call Conserve-O-Grams on a variety of subjects (too numerous to post here). anyway all of the Grams are available in pdf from the following website. Enjoy downloading
http://www.cr.nps.gov/museum/publications/conserveogram/cons_toc.html
http://shrinkster.com/2xh
http://snipurl.com/bobr
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Peter A. Kurilecz CRM, CA
Richmond, Va
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