Proceedings first conference on acoustic emission/microseismic activity in geologic structures and materials held at The Pennsylvania State University University Park, Pennsylvania, June 9-11, 1975 
edited by H. Reginald Hardy 
 - Clausthal, Ger.  Trans Tech  1977 
 - 489 p. : ill. ; 23 cm. 
<br/><br/>p. (467)-484 
<br/><br/><label>ISBN: </label>0878490175 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Rocks<br/>Geology