edited by H. Reginald Hardy, Jr. and Frederick W. Leighton ; conference sponsored by the Pennsylvania State University, Rock Mechanics LaboratoryTrans Tech Publications1984
edited by H. Reginald Hardy, Jr. and Frederick W. Leighton ; conference sponsored by the Pennsylvania State University, Rock Mechanics LaboratoryTrans Tech Publications1980
edited by H. Reginald Hardy, Jr. and Frederick W. Leighton ; conference sponsored by the Pennsylvania State University, Rock Mechanics LaboratoryTrans Tech Publications1977