ISBN-13: 9789061912088 / Angielski / Twarda / 1982 / 206 str.
ISBN-13: 9789061912088 / Angielski / Twarda / 1982 / 206 str.
‘Weak Rock - Soft, Fractured and Weathered Rock’, includes Volume. 3 of 3 of the Proceedings of the International Symposium on Weak Rock held in Tokyo on the 21-24 September 1981.