More years under the earth /

Members manual, 1979 /
Published: (1979)

Depths of the earth ; caves and cavers of the United States /
by: Halliday, William R., 1926-
Published: (1966)

Depths of the earth : caves and cavers of the United States /
by: Halliday, William R., 1926-
Published: (1976)

Speleology : the study of caves /
by: Moore, George William, 1928-
Published: (1978)

Cave exploring /
by: Anderson, Jennifer, 1942-
Published: (1974)

Speleology : caves and the cave environment /
by: Moore, George William, 1928-
Published: (1997)

Cave sleuths /
by: Lindop, Laurie
Published: (2006)

In the heart of Irian Jaya /
Published: (1993)

International journal of speleology.

Actes du Congres national de speleologie.

The complete book of cave exploration.
by: Pinney, Roy
Published: (1962)

Venturing underground : the new speleo's guide /
by: Lyon, Ben
Published: (1983)

Bulletin of the National Speleological Society.
Published: (1940)

One thousand metres down ; true adventures under the earth /
Published: (1957)

Speleological and karst glossary of Florida and the Caribbean /
Published: (2006)

Karst hydrology and physical speleology /
by: Bögli, Alfred, 1912-
Published: (1980)

Caving.
by: Lovelock, James
Published: (1969)

National Cave and Karst Research Institute Act of 1997.
Published: (1998)

Cavers, caves, and caving /
Published: (1977)

Alpine karst.
Published: (1977)

American caves and caving: techniques, pleasures, and safeguards of modern cave exploration /
by: Halliday, William R., 1926-
Published: (1974)

Encyclopedia of caves /
Published: (2012)

Subterranean climbers : twelve years in the world's deepest chasm /
by: Chevalier, Pierre, explorer
Published: (1975)

A guide to speleological literature of the English language : 1794-1996 /
Published: (1998)

Memoirs of a speleologist : the adventurous life of a famous French cave explorer /
by: Joly, Robert de
Published: (1975)

Beyond time /
by: Siffre, Michel
Published: (1964)

Caves of adventure /
by: Tazieff, Haroun, 1914-1998
Published: (1953)

Caves /
by: Kerbo, Ronal C.
Published: (1981)

The science of speleology /
Published: (1976)

Macocha a Moravský kras.
by: Stehlik, Vladimír
Published: (1961)

The blue holes of the Bahamas /
by: Palmer, Robert, 1951-
Published: (1985)

Desertification control : in the arid ecosystem of India for sustainable development /
Published: (2001)

Ghar Parau /
by: Judson, David M.
Published: (1973)

The upper cave at Bjorkliden : the Tornetrask region.
by: Rasmusson, Gunnar, 1927-
Published: (1971)

Jamaica underground : the caves, sinkholes, and underground rivers of the island /
by: Fincham, Alan
Published: (1997)

Homes of primeval man ; wandering in the caves of Czechoslovakia /
by: Kunsky, Josef
Published: (1954)