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- [8] TESTING OF ROOF-BOLTING SYSTEMS INSTALLED IN CONCRETE BEAMS TRANSACTIONS OF THE AMERICAN INSTITUTE OF MINING AND METALLURGICAL ENGINEERS, 1953, 196 (06): : 606 - 614
- [9] ROOF BOLTING EFFECTIVENESS AT MICHEL CANADIAN MINING AND METALLURGICAL BULLETIN, 1967, 60 (659): : 297 - &