Great Britain. Board of Trade. China-Clay Working Party
Manfred Störr
Lukʹi͡an Hryhorovych Tkachuk
Heber Carlos Ferreira
Wm. Hovey Smith
Leszek Stoch
Walter Edward Parham
H. Heystek
Raw Materials Research and Development Council (Nigeria)
ʻA ʻAtsmon
F. D. Ovcharenko
Duncan G. Ogden
William Richard Jones
Jason A Wark
William Newton Logan
Unknown Author
Yvonne Stourdzé Visconti
Walter E. Parham
Luciana Maria S. de Mesquita