Planning open pit mines proceedings - South African Institute of Mining and Metallurgy; Symposium on the Theoretical Background to the Planning of Open Pit Mines with Special Reference to Slope Stability, Johannesburg, 1970. (Cape Town Balkema (A.A.), for the South African Institute of Mining and Metallurgy, 1971)
Keywords: Slopes (Soil mechanics) -- Congresses; Strip mining -- Congresses