The value of bats
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Dr. Tom Kunz's work in Texas on the economic value of the Mexican freetail bat:
http://www.chron.com/disp/story.mpl/3259147.html
http://www.chron.com/disp/story.mpl/3259147.html
The Official Caving Forum of the National Speleological Society
http://forums.caves.org/