Pongsawat Suwatanapongched. (1997) Gingival fluid interleukin-1 beta level from healthy and periodontitis teeth. Mahidol University,:ม.ป.ท.Pongsawat Suwatanapongched. 1997. Gingival fluid interleukin-1 beta level from healthy and periodontitis teeth. ม.ป.ท.:Mahidol University,;Pongsawat Suwatanapongched. Gingival fluid interleukin-1 beta level from healthy and periodontitis teeth. ม.ป.ท.:Mahidol University, 1997. Print.