Nitipong Chotiwittayapon และ Nuanphun Chantarasiri. (2012) Use of propylene oxide polyol as cell opening agent in flexible polyurethane foam. Chulalongkorn University:ม.ป.ท.Nitipong Chotiwittayapon และ Nuanphun Chantarasiri. 2012. Use of propylene oxide polyol as cell opening agent in flexible polyurethane foam. ม.ป.ท.:Chulalongkorn University;Nitipong Chotiwittayapon และ Nuanphun Chantarasiri. Use of propylene oxide polyol as cell opening agent in flexible polyurethane foam. ม.ป.ท.:Chulalongkorn University, 2012. Print.