Ralph W. Pfouts
发表
Kenneth O. Kortanek,
Ralph W. Pfouts,
1982
.
Richard Schlegel,
Glenn L. Johnson,
R. Schlegel,
1973
.
Martin Shubik,
M. Shubik,
O. Morgenstern,
1959
.
Ralph W. Pfouts,
R. Pfouts,
1961
.