“FAKTOR RISIKO KEPARAHAN GINGIVAL LEAD LINE PADA PETUGAS SPBU DI MEDAN : RISK FACTORS OF GINGIVAL LEAD LINE SEVERITY OF GAS STATION EMPLOYEE IN MEDAN”. Dentika: Dental Journal 17, no. 3 (July 11, 2013): 251–254. Accessed February 5, 2026. https://idjpcr.usu.ac.id/dentika/article/view/1723.