See-aroon Chinprateeb. (1999) The cost-effectiveness of space maintenance surveillance system after primary second molar loss for primary school children in Rachaburi province. Mahidol University,:ม.ป.ท.See-aroon Chinprateeb. 1999. The cost-effectiveness of space maintenance surveillance system after primary second molar loss for primary school children in Rachaburi province. ม.ป.ท.:Mahidol University,;See-aroon Chinprateeb. The cost-effectiveness of space maintenance surveillance system after primary second molar loss for primary school children in Rachaburi province. ม.ป.ท.:Mahidol University, 1999. Print.