Johan P.
Wibaut

Amsterdam


Herman J.
den Hertog

Wageningen University


Sidney Augustus
Norton

Ohio Agricultural and Mechanical College






Homer B.
Adkins

UW Madison


Richard Haven
Wiley

Hunter College, CUNY

Hendrikus (Henk) Cornelis
van der Plas

Wageningen University
(Options)

J (Hans)
Tramper

Wageningen University

René H.
Wijffels

Wageningen University

Hendrikus (Henk) van der PlasX