Heinrich Georg
Bronn

Universität Heidelberg


Edmond
Hébert

ENS Paris (Evolution Tree)


Karl Alfred
von Zittel

Universität München (Evolution Tree)


John C.
Merriam

Carnegie Institution of Washington (Evolution Tree)



Hubert Gregory
Schenck

Stanford
(Options)


Richard
Cifelli

National Museum of Natural History

Donald Leslie
Frizzell

Missouri University of Science and Technology

Ronald
Greeley

Arizona State (Physics Tree)

Hubert SchenckX