Kriwut Yanawimuti และ Paveena Chaovalitwongse. (2014) COST REDUCTION IN NATURAL RUBBER MILK COLLECTION. Chulalongkorn University:ม.ป.ท.Kriwut Yanawimuti และ Paveena Chaovalitwongse. 2014. COST REDUCTION IN NATURAL RUBBER MILK COLLECTION. ม.ป.ท.:Chulalongkorn University;Kriwut Yanawimuti และ Paveena Chaovalitwongse. COST REDUCTION IN NATURAL RUBBER MILK COLLECTION. ม.ป.ท.:Chulalongkorn University, 2014. Print.