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_7_ <br />' 'Jennings, J.E. and Robertson, A. MacG., 1969, "Procedures <br />for the Prediction of the Stability of Slopes Cut in Natural <br />'~ Rock", Prac. 7t.`1 Znt. Conf. on Soil Mech., Mexico City, 1969. <br />t Robertson A. M., 1982, Deformation and Monitoring of Waste <br />Dump Slopes. Proc. of the Fpur`..h Canadian Symposium on Mining <br />Surveying and Deformation Measurements, Banff, Alberta, June <br />1982. <br />Robertson, A. M., Olsen, R.S., Pierce, G.L., 1987, <br />' "Assessment of Weak Altered Rack Masses at the Island Copper <br />Mine", Proc. S,ME Annual Meeting, Denver, February. <br />Robertson A. M., 1988, "Estimating Weak Rock Strength" AIMS <br />' Ganeral Meeting Tucson, Arizona, 1488. <br /> <br />1 <br />i <br />1 <br /> <br />1 <br /> <br />LJ <br />1 <br />1 <br />1 <br />1 <br />