Cripps, J. C., Coulthard, J. M., & Culshaw, M. G. (1993). The engineering geology of weak rock. Rotterdam: Ashgate Publishing Co..
Παραπομπή Chicago StyleCripps, J. C., J. M. Coulthard, and M. G. Culshaw. The Engineering Geology of Weak Rock. Rotterdam: Ashgate Publishing Co., 1993.
Παραπομπή MLACripps, J. C., J. M. Coulthard, and M. G. Culshaw. The Engineering Geology of Weak Rock. Rotterdam: Ashgate Publishing Co., 1993.
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