Tomi Ungerer
Ira N. Levine
Eugene F. Stoermer
Eileen J. Cox
Joseph Seckbach
Michael Zohary
Frederick William Mills
Adolf Schmidt
A. G. Gaydon
Friedrich Traugott Kützing
T. V. Desikachary
Friedrich Hustedt
I. Kaczmarska
Francis Wolle
International Diatom Symposium (17th 2002 Ottawa, Canada)
International Diatom Symposium (7th 1982 Philadelphia, Pa.)
Symposium on Recent and Fossil Diatoms (6th 1980 Budapest, Hungary)
B. J. Cholnoky