Weak rock: soft fractured and weathered rock: proceedings of the International Symposium on Weak Rock, Tokyo, 21-24 September, 1981/
edited by Koichi Akai, Masao Hayashi, Yuichi Nishimatsu.-
- Rotterdam: A.A. Balkema, 1981.
- vol. :ill.
Includes bibliographical references.
Rock mechanics--Addresses, essays, lectures. Rocks--Testing.