MENDOZA-HERNÁNDEZ, Yornelly; MORALES-CHÁVEZ, Mariana. Caries and premature loss of the first permanent molar in grade school children, and parents’ knowledge level, in Vargas state, Venezuela.. Journal of Oral Research, [S.l.], v. 8, n. 2, p. 166-172, may 2019. ISSN 0719-2479. Available at: <http://joralres.com/index.php/JOR/article/view/joralres.2019.026>. Date accessed: 04 june 2020. doi: https://doi.org/10.17126/joralres.2019.026.