Engineering classification and index properties for intact rock / Deere, Don U.; Miller, R. P. -- New Mexico : Air Force Weapons Laboratory, 1966.
xiv, 300 p.
1. Introduction;2. Existing systems of rock classification;3. Hardness of rocks;4. Experimental studies;5. Discussion and interpretation of experimental data;6. Engineering classification and index properties for intact rock;7. Summary and conclusions
552.1 DEE
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