- Charles Caldwell Hawley, Chester T. Wrucke, David J. Grimes, Donald H. Richter, Donald Harvey Whitebread, Garland Bayard Gott, Hugh Edward Clifton, Hugh T. Millard, Jack James Rowe, Keith Brindley Ketner, Richard Philip Fischer, Robert Lutz Foster, Wallace R. Griffitts, A. P. Marranzino, Charles J. Zablocki, Donald B. Hoover, Frederick Otto Simon, Frederick S. Fisher, Henry V. Alminas, James George Evans, John Marinenko, N. A. Matson, Theodore J. Armbrustmacher, John E. McLane, Thomas D. Hessin
· 1949
No image available
No image available
Charles Caldwell Hawley, Chester T. Wrucke, David J. Grimes, Donald H. Richter, Donald Harvey Whitebread, Garland Bayard Gott, Geological Survey (U.S.), H. P. Eisenhuth, Hugh Edward Clifton, Hugh T. Millard, Jack James Rowe, Keith Brindley Ketner, Richard Philip Fischer, Robert Lutz Foster, Wallace R. Griffitts, A. P. Marranzino, Charles J. Zablocki, Donald B. Hoover, Frederick Otto Simon, Frederick S. Fisher, Henry V. Alminas, James George Evans, John Marinenko, N. A. Matson, Theodore J. Armbrustmacher, John E. McLane, Thomas D. Hessin· 1968
No image available