Panich Olanwanich. 1996. Development of a polyurethane using diethylene glycol as a chain-extender. Bangkok:Chulalongkorn University;
Panich Olanwanich. (1996) Development of a polyurethane using diethylene glycol as a chain-extender (รายงานผลงานวิจัย). Chulalongkorn University:Bangkok.
Panich Olanwanich. Development of a polyurethane using diethylene glycol as a chain-extender. Bangkok:Chulalongkorn University, 1996.
Panich Olanwanich. (1996) Development of a polyurethane using diethylene glycol as a chain-extender (รายงานผลงานวิจัย). Chulalongkorn University:Bangkok.