L. L. Bernard, J. S. Bernard, Carl Murchison, Ernst Adolf Bernhard, Albert Kuntz, J. Arthur Harris, C. M. Jackson, D. C. Paterson, R. E. Scammon, Victor Mercante, William S. Walsh, J. H. Dennison, Wolfgang Wieland, C. Doliveira, Gregoria Maranon, Juan Marinello, Harold J. Laski, Thiselton Mark, Kimball Young, E. T. Krueger, Walter C. Reckless, Paul V. West, Charles E. Skinner, Georg Steiler, Frank K. Notch, Peter Odegard, Leo Markun, Rene Fulop-Miller, H. L. Hollingworth
• 1931