Wasana Tanakwang. 1999. Types of liptinite in petroleum source rocks Pattani basin Gulf of Thailand. Field of Study Geology, Chiang Mai University;
Wasana Tanakwang. (1999) Types of liptinite in petroleum source rocks Pattani basin Gulf of Thailand . Chiang Mai University/Chiang Mai.
Wasana Tanakwang. Types of liptinite in petroleum source rocks Pattani basin Gulf of Thailand. . Chiang Mai:Chiang Mai University, 1999.
Wasana Tanakwang. (1999) Types of liptinite in petroleum source rocks Pattani basin Gulf of Thailand . Chiang Mai University/Chiang Mai.