TY  - BOOK
AU  - Akai K
AU  -  Hayashi M
AU  -  Nishimatsu Y
ED  - Internal symposium on weakk rock: soft factured and weathered rock (1981 : Tokyo)
TI  - Proceeding on weak rock: soft,fractured and weathered rock
U1  - H2p1,N81, M1.1 
PY  - 1981///
KW  - Geology
ER  -