Preparation Characteristics of Coal from Tazewell County, Va by Manuel Gomez, Kenneth Keith Kelley, William W. Weller, Edward G. King, Raynard V. Lundquist, Murphy E. Hawkins, Paul Watson Johnson, Frank A. Peters, William D. Dietzman, Ralph C. Kirby, T. E. Gray, Sebastian J. Aresco, Albert W. Deurbrouck, Louis B. Pankratz, Joe B. Rosenbaum, Arthur E. Bruszak, Carl J. Chindgren, D. A. Martin, D. S. Harper, Frederick W. Hoertel, John W. Smith, Marcel Vanpée, Richard F. Hewlett, William R. K. Wu, William Samuel Landers, C. O. Carman, Harold Leitch, John B. Janus, Laurence G. Trudell, Lester C. Bauerle, E. O. Wagner, Flora E. Walker, J. M. Seward, Kenneth E. Stanfield