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Demand and supply of national rubber : P. 1 (updated) and 2
Smit, Hidde P., (1982)
Demand and supply of natural rubber ; 1
Smit, Hidde P., (1981)
The productivity of labor in the rubber tire manufacturing industry
Gaffey, John Dean, (1968)
The world rubber economy to the year 2000 : its prospects and the implications of production policies on market conditions for natural rubber
Smit, Hidde Pieter, (1982)
International commodity policy : a quantitative analysis
Herrmann, Roland, (1993)
International market responses to the Asian crisis for rubber, cocoa and coffee
Burger, Kees, (2015)