The World of Caves, Mines, and TunnelsBook - 1999
Discusses how people have used caves, mines, and tunnels to explore, utilize, travel through, and inhabit the interior of the earth.
Publisher: New York : Peter Bedrick Books, 1999, c1998
Edition: 1st American ed
Characteristics: 44 p. : ill. (some col.), col. maps ; 31 cm
Alternative Title: Caves, mines, and tunnels