ISBN 0914264206 books & textbook
The Jewel Cave Adventure: Fifty Miles of Discovery Under South Dakota (Speleologia)
Zephyrus Press /1977T Paperback / 238 Pages
isbn-10: 0914264206 / isbn-13: 9780914264200
Zephyrus Press /1977T Paperback / 238 Pages
isbn-10: 0914264206 / isbn-13: 9780914264200