Kok, René, Somers, Erik (1) Leiber, Fritz (1) Steiger, Brad (1) Slocum, Terry A (university Of Kansas Usa), Mcmaster, Robert B, Kessler, Fritz C (pennsylvania State University Pa Usa) (1) Slocum, Terry A. (university Of Kansas, Mcmaster, Robert B, Kessler, Fritz C. (pennsylvania State University, Howard, Hugh.h (american River College (1)