Earthquakes and volcanoes : readings from Scientific American / Bruce A. Bolt. Scientific American. Bolt, Bruce A., 1930- Earthquakes. Volcanoes. QE521 .E2 551.2 EAR Includes index. Bibliography: p. 146-149. San Francisco : W. H. Freeman, c1980. c1980. 1980 Text vii, 154 p. : eng