Nopadol Cheucharoenvasuchai. (1998) Study of periodontal status and black-pigmented anaerobes in periodontitis patients undergoing fixed orthodontic treatment. Mahidol University,:ม.ป.ท.Nopadol Cheucharoenvasuchai. 1998. Study of periodontal status and black-pigmented anaerobes in periodontitis patients undergoing fixed orthodontic treatment. ม.ป.ท.:Mahidol University,;Nopadol Cheucharoenvasuchai. Study of periodontal status and black-pigmented anaerobes in periodontitis patients undergoing fixed orthodontic treatment. ม.ป.ท.:Mahidol University, 1998. Print.