Sa-Nga Boonumrung. (1987) Factors influencing the immunization of children 1-5 years of age a survey in Tumbol Nongrong, Panomtaun district, Kanchanaburi province, Thailand. Mahidol University,:ม.ป.ท.Sa-Nga Boonumrung. 1987. Factors influencing the immunization of children 1-5 years of age a survey in Tumbol Nongrong, Panomtaun district, Kanchanaburi province, Thailand. ม.ป.ท.:Mahidol University,;Sa-Nga Boonumrung. Factors influencing the immunization of children 1-5 years of age a survey in Tumbol Nongrong, Panomtaun district, Kanchanaburi province, Thailand. ม.ป.ท.:Mahidol University, 1987. Print.