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Accurate navigation and control of continuous mining machines for coal mining

Schiffbauer, William H.
Pittsburgh, PA : U.S. Dept. of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupaitonal Safety and Health, Pittsburgh Research Laboratory, [1997] 1997

Accurate navigation and control of continuous mining machines for coal mining

Schiffbauer, William H.
Pittsburgh, PA : U.S. Dept. of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupaitonal Safety and Health, Pittsburgh Research Laboratory, [1997] 1997