Herbert Edward Terrick Haultain
Bernard Etkin
Volker Amann
Renliang Xu
John A. Breslin
James Lee Smith
European Symposiùm on Particle Size Measurement Nuremberg 1975.
American Institute of Chemical Engineers. Equipment Testing Procedures Committee
Particle Size Analysis Conference University of Salford 1977.
American Society for Testing and Materials
California Institute of Technology. Dept. of Environmental Health Engineering.
United Nations. Economic Commission for Europe.
Berg- und Hüttenmännischer Tag (23rd 1972 Freiberg, Germany)
Claus Bernhardt
Wilhelm Batel
Ajit Jillavenkatesa
James B. Riley
Richard R. Klimpel
Clive Washington
California Institute of Technology. Dept. of Environmental Health Engineering