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Spelology Caves And The Cave Environment,New McGraw-Hill Education TAB Established As Insurance To PreserveThis Newlyrevised Edition Of A Classic Introduction To Speleology Covers The Latest Discoveries About The Mysterious World Of Caves. Drs. Moore And Sullivan Are Among The Founders Of Modern Cave Research. They Present Here The Principles Of Speleology In Language That Anyone Can Understand. The Authors Show How Cave Processes Involve Biological As Well As Geological, Chemical, And Physical Processes, And They Examine Such Topics As The Origin Of