TY - BOOK ED - Conference on Acoustic Emission/Microseismic Activity in Geologic Structures and materials (1st : 1977 : Pennsylvania) ED - Hardy, H. Reginald (Henry Reginald), 1931- TI - 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 SN - 0878490175 PY - 1977/// CY - Clausthal, Ger. PB - Trans Tech KW - Rocks KW - Geology N1 - p. (467)-484 ER -