Morgan, Robert J. (2) Justice, Robert (2) 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) Cook, Barbara (1)