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Design and testing of Bureau of Mines coal planer

Published Year

• 1950-1959 (1)

Subject

• Coal mines and mining--Pennsylvania (1) *
• Coal mines and mining--Pennsylvania--Equipment and supplies (1)

Author

• Buch, John Willard. (1)
• Griffith, Walter R. (1) *
• Schimmel, John T. (1)

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