Hubungan antara perilaku ibu dan pengalaman Karies Gigi anak usia 3 tahun ke bawah : uji laboraturium transmisi vertikal Streptococcus mutans dan Streptococcus sobrinus = Relationship between mother's behavior and dental caries experience of children aged 3 years and under : laboratory test of Streptococcus mutans and Streptococcus sobrinus vertical transmission (Fakultas Kedokteran Gigi Universitas Indonesia, 2012)