Chanpheng Phommavone และ Boonchai Sangpetngam. (2012) Resilient modulus and influencing parameters of unbound crushed limestone. Chulalongkorn University:ม.ป.ท.Chanpheng Phommavone และ Boonchai Sangpetngam. 2012. Resilient modulus and influencing parameters of unbound crushed limestone. ม.ป.ท.:Chulalongkorn University;Chanpheng Phommavone และ Boonchai Sangpetngam. Resilient modulus and influencing parameters of unbound crushed limestone. ม.ป.ท.:Chulalongkorn University, 2012. Print.