Acoustic emission/microseismic activity in geologic structures and materials : proceedings of the third conference, held at the Pennsylvania State University, University Park, Pennsylvania, October 5-7, 1981 / edited by H. Reginald Hardy, Jr. and Frederick W. Leighton ; conference sponsored by the Pennsylvania State University, Rock Mechanics Laboratory. (Series on rock and soil mechanics ; v. 8 (1984))
Acoustic emission/microseismic activity in geologic structures and materials : proceedings of the third conference, held at the Pennsylvania State University, University Park, Pennsylvania, October 5-7, 1981 / edited by H. Reginald Hardy, Jr. and Frederick W. Leighton ; conference sponsored by the Pennsylvania State University, Rock Mechanics Laboratory.