Hubungan riwayat abortus ibu hamil dan kejadian Abortus spontan di Rumah Sakit Cipto Mangunkusumo Tahun 2011 = The relation between abortion history of pregnant mother and spontaneous abortion at Cipto Mangunkusumo Hospital in 2011 / Bayu Kusumawardhani - Bayu Kusumawardhani, author (2014)