Isarawit Chaopanich และ Somchai Puajindanetr. (2010) Study of grinding factors for spherical forming of porous polyurethane foam /. Chulalongkorn University,:ม.ป.ท.Isarawit Chaopanich และ Somchai Puajindanetr. 2010. Study of grinding factors for spherical forming of porous polyurethane foam /. ม.ป.ท.:Chulalongkorn University,;Isarawit Chaopanich และ Somchai Puajindanetr. Study of grinding factors for spherical forming of porous polyurethane foam /. ม.ป.ท.:Chulalongkorn University, 2010. Print.