Planning open pit mines : proceedings ... / ed. by P.W.J. van Rensburg. - Cape Town : A.A. Balkema for the South African Institute of Mining and Metallurgy, 1970. At head of title: Open pit mining symposium 1970. Bibliography on slope stability: p. 367-388. Subjects--Topical Terms: Strip mining -- Congresses.--Strip mining -- Congresses.Slopes (Soil mechanics) -- Congresses.--Slopes (Soil mechanics) -- Congresses.