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         Speleology General:     more books (33)
  1. Speleology: Caves & the Cave Environment by George W. Moore, G. Nicholas Sullivan, 1997-06
  2. Caves and Speleology in Bulgaria by Petar Beron, Trifon Daaliev, et all 2006-11-30
  3. Karst Hydrology and Physical Speleology by Alfred Bogli, 1980-06
  4. Speleology the Study of Caves by George W. Moore, G. Nicholas Sullivan, 1981-06
  5. Caves of Northern Thailand by Pindar Sidisunthorn, Simon Gardner, 2007-02-01
  6. Caving: Sport, Cave, Speleology, Cave rescue, Urban exploration, Caving organizations, Pit cave, Cave diving, Outdoor exploration
  7. Cave: Sea cave, Rock shelter, Grotto, Speleology, Glacier cave, Anchihaline caves, Caving, Cave Conservancies, Cave Research Foundation, Cenote, Flowstone
  8. Caves: Exploring Hidden Realms (Imax) by Michael Ray Taylor, Ronal C. Kerbo, 2001-03-01
  9. Cave Sleuths: Solving Science Underground (Science On The Edge) by Laurie Lindop, 2004-08-13
  10. Dark Life: Martian Nanobacteria, Rock-Eating Cave Bugs, and Other Extreme Organisms of Inner Earth and Outer Space by Michael Ray Taylor, 1999-04-09
  11. Venturing Underground: The New Speleo's Guide by Ben Lyon, 1984-07
  12. The Wilderness Underground: Caves of the Ozark Plateau by H. Dwight Weaver, 1992-06
  13. Beneath the Mountains: Exploring the Deep Caves of the Asturias by David Rose, Richard Gregson, 1987-06-01
  14. Trapped!: The Story of Floyd Collins by Robert K. Murray, Roger W. Brucker, 1982-12-31

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