Unknown Author
Ian William Wark
Jana Hubáčková
Yee-Ho Chia Wang
F. Sebba
Patrick Zhang
Maurice C. Fuerstenau
I. N. Plaksin
Hans Joachim Schulze
Heinrich Schubert
F. W. Benn
G. E. Smith
Lars Lidström
Dianzuo Wang
Mku T. Ityokumbul
Frederick Galloway Moses
Symposium on the Fiftieth Anniversary of Froth Flotation in the U. S. A. (1961 Denver)
Ann N. Clarke
Soveshchanie po teorii flotat͡sionnogo obogashchenii͡a (2nd 1948 Moscow, Russia)
Arthur Paul Wichmann