Somlitko Vilavong. 2004. coffee production systems in three southern provinces of Lao People's Democratic RepublicSomlitko Vilavong. Field of Study Systems Agriculture, Khon Kaen University;
Somlitko Vilavong. (2004) coffee production systems in three southern provinces of Lao People's Democratic RepublicSomlitko Vilavong . Khon Kaen University/Khon Kaen.
Somlitko Vilavong. coffee production systems in three southern provinces of Lao People's Democratic RepublicSomlitko Vilavong. . Khon Kaen:Khon Kaen University, 2004.
Somlitko Vilavong. (2004) coffee production systems in three southern provinces of Lao People's Democratic RepublicSomlitko Vilavong . Khon Kaen University/Khon Kaen.