Proceedings First Conference on Acoustic erussion/Microseismic Activity in Geologic Structures and Materials  held at the Pennslyvania State University, University Park, Pennsylvania, June 9-11, 1975 
edited by H. Reginald Hardy and Frederick W. Leighton 
 - Clausthal  Trans Tech  1977 
 - 489 p.  ill. 
 - Series on rock and soil mechanics  vol. 2 (1974/77), no. 3 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Rock mechanics<br/>Soil mechanics<br/>Rock deformation<br/>Acoustic erussion