Nguyen Thi Hai Yen และ Naowarat Kanchanakhan. (2013) PREVALENCE AND FACTORS RELATED TO DENTAL CARIES AMONG 6 YEARS OLD CHILDREN IN NHA TRANG CITY KHANH HOA PROVINCE VIETNAM. Chulalongkorn University:ม.ป.ท.Nguyen Thi Hai Yen และ Naowarat Kanchanakhan. 2013. PREVALENCE AND FACTORS RELATED TO DENTAL CARIES AMONG 6 YEARS OLD CHILDREN IN NHA TRANG CITY KHANH HOA PROVINCE VIETNAM. ม.ป.ท.:Chulalongkorn University;Nguyen Thi Hai Yen และ Naowarat Kanchanakhan. PREVALENCE AND FACTORS RELATED TO DENTAL CARIES AMONG 6 YEARS OLD CHILDREN IN NHA TRANG CITY KHANH HOA PROVINCE VIETNAM. ม.ป.ท.:Chulalongkorn University, 2013. Print.