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Material handling devices for underground mines / by Ernest J. Conway, Richard L. Unger

By: Conway, Ernest J.
Contributor(s): Unger, Richard L | United States. Bureau of Mines.
Material type: materialTypeLabelBookSeries: United States Bureau of Mines. Information cicular 9212. Publisher: Pgh. [i.e. Pittsburgh] Pa. : U.S. Dept. of the Interior, Bureau of Mines, 1988Description: ii, 48 p. : ill. ; 28 cm.Report number: USBM ic-9212Subject(s): Coal-mining machinery
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