TY  - BOOK
ED  - Symposium on Rock Mechanics
TI  - Failure and breakage of rock: Proceedings of the eighth symposium... held at the university of minnesota, september 15-17th, 1967 
AV  - TA706 S91966
PY  - 1967///
CY  - New York
PB  - The american inst. of mining
ER  -