Unknown Author
F. Bugnicourt
Richard Evans Schultes
Luis E. Gregory
P. J. S. Cramer
A. Thomas
P. R. Wycherley
Joaquim Ivanir Gomes
J. T. Baldwin
R. K. S. Murray
Colloque sur la physiologie du latex d'Hevea brasiliensis Montpellier, France 1975.
Joseph Léon Coppin
J. B. Gomez
National Rubber Research and Extension Conference Mindanao Institute of Technology 1974.
Jandira U. S. Pittro
Hun Woon Kow
O. F. Bishop
Johan Hubert Egbert Hessels
P. J. George