Sugawara, K., & Obara, Y. (1997). Rock stress: : proceedings of the international symposium, Kumamoto, 7-10 October 1997. Rotterdam: A. A. Balkema.
Παραπομπή Chicago StyleSugawara, Katsuhiko, and Yuzo Obara. Rock Stress: : Proceedings of the International Symposium, Kumamoto, 7-10 October 1997. Rotterdam: A. A. Balkema, 1997.
Παραπομπή MLASugawara, Katsuhiko, and Yuzo Obara. Rock Stress: : Proceedings of the International Symposium, Kumamoto, 7-10 October 1997. Rotterdam: A. A. Balkema, 1997.
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