Диссертация на тему «Научное обоснование ...
2. Hartley, W K, 1981. Changes in Mining Methods in the Kimberly Mines of DeBeers Consolidated Mines, Ltd, RSA Block Caving to Caving, in Design and Operation of Caving and Sublevel Stoping Mines (Ed: D R Stewart) pp 3-16 (SME, AIME: New York).