Laserfiche WebLink
e <br />`~~ -X1111111111111111111 -~r <br />U.S. DEPARTMENT OF COMMERCE <br />national Technical Information Service <br />PB-259 316 <br />Technology of <br />Auger Mining <br />Ford, Bacon and Davis, Inc, New York <br />Prepared for <br />Bureau of Mines, Spokane, Wash Spokane Mining Research Center <br />Oct 75 <br />