Islam 89 Missions 85 Da'wah (Islam) 56 Dissertations 26 Dissertations, Academic 26 Da`wah (Islam) 21 Muslim converts 10 Religious aspects 8 Methodology 7 Religious life 6 Daʻwah (Islam) 4 History 4 Indigenous peoples 4 Societies, etc 4 Mission 3 Social conditions 3 Apostasy 2 Batak (Indonesian people) 2 College students 2 Drama 2 Islamic religious education 2 Kufr (Islam) 2 Mosques 2 Prisoners 2 Religion 2 Social aspects 2 Social life and customs 2 Activity programs 1 Allegorical interpretations 1 Apologetic works 1