APA
Akai K, Internal symposium on weakk rock: soft factured and weathered rock (1981 : Tokyo), Hayashi M & Nishimatsu Y. (1981). Proceeding on weak rock: soft,fractured and weathered rock. : .
Chicago
Akai K, Internal symposium on weakk rock: soft factured and weathered rock (1981 : Tokyo), Hayashi M and Nishimatsu Y. 1981. Proceeding on weak rock: soft,fractured and weathered rock. : .
Harvard
Akai K, Internal symposium on weakk rock: soft factured and weathered rock (1981 : Tokyo), Hayashi M and Nishimatsu Y. (1981). Proceeding on weak rock: soft,fractured and weathered rock. : .
MLA
Akai K, Internal symposium on weakk rock: soft factured and weathered rock (1981 : Tokyo), Hayashi M and Nishimatsu Y. Proceeding on weak rock: soft,fractured and weathered rock. : . 1981.
