Biblioteca SEGEMAR

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Krech, Warren W.

A standard rock suite for rapid excavation research Krech, Warren W.; Henderson, Frank A.; Hjelmstad, Kenneth E. - Washington Bureau of mines 1974 - 29 p. - RI 7865 .

Subjects--Topical Terms:
MINERIA
MINING

Subjects--Index Terms: EXCAVACION MECANICA DE ROCAS EXCAVATION ROCK MECHANICS

Universal Decimal Class. No.: 622