Evaluating Sulfur and Ash Distribution in Coal Seams by Statistical Response Surface Regression Analysis

by A. E. Schwaneke, Ernest L. Corp, J. Vance Batty, James S. Browning, Manuel Gomez, Rex D. Thomas, Robert Bruce Tippin, Robert M. Doerr, Roy Newman, V. Anthony Cammarota (Jr.), Benjanim F. Andrew, David Schlain, J. W. Jensen, Kathleen Hazen, Paul E. Bennett, Philip B. Lorenz, Wilbert L. Falke, T. O. Llewellyn · 1970