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World tea : record of the opening session of International Symposium on Tea Science held at University of Shizuoka, August 26, 1991
(1991)
An industrial organization approach towards the world tea economy : with special focus on auction theory and futures markets (Sri Lanka, India, Indonesia)
Friedheim, Thomas, (1996)
Sustainability issues in the tea sector : a comparative analysis of six leading producing countries
Wal, Sanne van der, (2008)