00252nam a2200109 a 450000500170000002000150001708200200003210000190005224500170007126000330008830000210012120251203091658.0  a0716722364  a551.22,bD, bol  aBolt, Bruce A.  aEarthqualkes  aNew YorkbW.H. Freemanc1993  axviii,332p, 22cm