Samphanh Khamsingsavath. (1997) A case control study of the protective effect of measles vaccine used during 1994-1996 in Vientiane Municipality (Lao.P.D.R.). Mahidol University,:ม.ป.ท.Samphanh Khamsingsavath. 1997. A case control study of the protective effect of measles vaccine used during 1994-1996 in Vientiane Municipality (Lao.P.D.R.). ม.ป.ท.:Mahidol University,;Samphanh Khamsingsavath. A case control study of the protective effect of measles vaccine used during 1994-1996 in Vientiane Municipality (Lao.P.D.R.). ม.ป.ท.:Mahidol University, 1997. Print.