Andrew Cowper
Lawson

UC Berkeley (Geotree)


Ferdinand
Zirkel

Universität Leipzig (Geotree)


Paul Heinrich
von Groth

Universität München (Geotree)


Victor Mordechai
Goldschmidt

Universität Heidelberg (Geotree)


Charles
Palache

Harvard (Geotree)


Ian
Campbell

California Division of Mines and Geology (Geotree)


Elburt Franklin
Osborn

Penn State (Geotree)

F.P.
Glasser

University of Aberdeen
(Options)

Anthony R.
West

University of Aberdeen

María Elena
Villafuerte

Instituto de investigaciónes en materiales UNAM

Steven J.
Milne

University of Leeds (United Kingdom) (Physics Tree)


Derek C
Sinclair

University of Sheffield (United Kingdom)

Jan
Skakle

University of Aberdeen

F.P. GlasserX