Recovery Percentage of Bituminous Coal Deposits in the United States (in Two Parts).

Underground mines. Part 1

by Aaron G. Starliper, Boyd D. Nash, Floyd G. Anderson, Henry G. Iverson, Herbert R. Babitzke, John F. Smith, John Hudy, John L. Reuss, John M. Gomes, John S. Berber, Joseph M. Singer, K. Robert Dorman, Kenneth J. Miller, Max Richard Geer, Milton M. Tilman, Ralph V. Higgins, Raymond L. Lowrie, Raymond O. Dannenberg, Sebastian J. Aresco, Wilbert T. Malenka, A. W. Deurbrouck, Alan J. Leighton, Arthur E. Bruszak, D. R. Mathews, George M. Potter, Heine Kenworthy, Jack G. Croeni, James A. Hultz, John B. Janus, Kenji Uchida, M. E. Poad, M. M. Fine, P. S. Jacobsen, Robert V. Rahfuse, Thomas T. Campbell, Arthur Alonzo Orning, Don Hobart Baker, Frank E. Block, John S. Winston, Joseph Grumer, Maynard O. Serbousek, Michael Sokaski