Geological hazards : their assessment, avoidance, and mitigation / F.G. Bell. Bell, F. G. (Frederic Gladstone) Natural disasters. Geodynamics. GB5014 .B45 1999 551 21 BEG Includes bibliographical references and index. New York : E & FN Spon, 1999. 1999. 1999 Text viii, 648 p. : http://www.loc.gov/catdir/enhancements/fy0651/98039190-d.html eng