Nguyen Thi Hai Yen และ Naowarat Kanchanakhan. (2015) PREVALENCE AND FACTORS RELATED TO DENTAL CARIES AMONG 6 YEAR-OLD CHILDREN IN NHA TRANG CITY KHANH HOA PROVINCE, VIETNAM. <i>Journal of Health Research</i>, <i>29</i>(4), 251.Nguyen Thi Hai Yen และ Naowarat Kanchanakhan. "PREVALENCE AND FACTORS RELATED TO DENTAL CARIES AMONG 6 YEAR-OLD CHILDREN IN NHA TRANG CITY KHANH HOA PROVINCE, VIETNAM". Journal of Health Research 29 (2015):251.Nguyen Thi Hai Yen และ Naowarat Kanchanakhan. PREVALENCE AND FACTORS RELATED TO DENTAL CARIES AMONG 6 YEAR-OLD CHILDREN IN NHA TRANG CITY KHANH HOA PROVINCE, VIETNAM. Chulalongkorn Universtiy Press:ม.ป.ท. 2015.