U.S. National Park Service Cave NewslettersInside Earth (loads slowly)
A second issue is now out.(7/27/98) New issue (Fall 98) of Inside Earth published by NPS.
(posted 11/9/98) (There are now several issues out
as of Fall 1999)
The World Wildlife Fund Global 2000 Initiative
identifies Critical and Endangered Ecosystems that include karst areas (They don't admit it, but KlamathForest, Vancouver Island, Prince of Wales Island, and other areas contain
significant cave and karst resources).