Weak rock : soft, fractured and weathered rock proceedings of the International Symposium on Weak Rock, Tokyo, 21-24 September 1981 - International Symposium on Weak Rock (1981 : Tokyo).; Akai, Koichi; Hayashi, Masao; Nishimatsu, Yuichi (Rotterdam : A. A. Balkema, 1981)
Includes bibliographical references.
Keywords: Rock mechanics -- Congresses