Wanachiwanawin, D. ., V. . Junnoo, J. Ongrotchanakun, S. . Kaewmanee, P. . Punthuprapasa, A. . Yoolek, S. . Suvuttho, N. . Monkong, P. . Lertlaituan, and W. . Patharangura. “Prevalence of Parasitic Infections in Thai Workers from 1993 to 1997”. Siriraj Medical Journal, vol. 51, no. 4, Apr. 1999, pp. 225-31, https://he02.tci-thaijo.org/index.php/sirirajmedj/article/view/246980.