Paul
Niggli

ETH Zürich (Chemistry Tree)


Conrad R.
Burri

ETH Zürich (Chemistry Tree)


Ernst Heinrich
Niggli

Universität Bern (Geotree)


Emile
den Tex

Utrecht (Geotree)


Hans Gerhard
Avé Lallemant

Rice University (Chemistry Tree)

Jaime G.
Perez De Armas

Rice University
(Options)

Jaime Perez De ArmasX