00635cam a2200205 4500 1104446025 TxAuBib 20191210120000.0 ||||||s1992||||||||||||||||||||||||und|u 9781879961005 1879961008 TxAuBib Rea, Tom. Caving basics : a comprehensive guide for beginning cavers. 3rd rev. ed. Huntsville, Ala., USA : National Speleological Society, 1992. viii, 187 p. : ill. ; 28 cm. 20191210. https://lccn.loc.gov/92080953