Segal, Elizabeth (arizona State University), Gerdes, Karen (arizona State University), Steiner, Sue (california State University Chico) (2) O'neill, Barrett (university Of California (1) Anton, Howard (drexel University), Rorres, Chris (drexel University), Kaul, Anton (california Polytechnic State University) (1) Abbott, George Knapp (1) Enderton, Herbert B. (university Of California (1)