Monitoring Ground Movements Near Caving Stopes by Donald J. Bauer, Robert K. Koch, Steven J. Page, M. B. Shirts, Syd S. Peng, Morton Min Wong, A. V. Petty, C. Melvin Lepper, David R. Hanson, Donald E. Shanks, Earl L. Phillips, H. B. Salisbury, James H. Maysilles, John W. Walkiewicz, Louis Anthony Panek, Richard O. Kneisley, Ronald R. Backer, Seth C. Schaefer, Terry L. Hebble, Theodore A. Kubala, Davis E. Traut, Eddie Martin, Frank J. Perzak, Glen A. Rowell, John M. Burrus, John S. Winston, Judith A. Eisele, Marinus L. Wouden, Richard E. Thill, Vernon R. Miller, Willard John Tesch, Richard A. Busch, Danton L. Paulson, Dwight L. Sawyer, Elton L. Litchfield