Hubungan antara pengetahuan ibu tentang imunisasi Measles Rubella (MR) dengan status imunisasi MR pada anak usia 9 - 59 bulan saat kampanye imunisasi MR di Provinsi Banten, DKI Jakarta, dan Jawa Barat tahun 2017 = Relationship between mother's knowledge about Measles Rubella immunization (MR) with MR immunization status in children aged 9-59 months in MR campaign at Banten, DKI Jakarta, and West Java Province at 2017 / Irma Gusmi Ratih