Dissertations 409 Dissertations, Academic 404 Purification 300 Sewage 181 Islam 135 Water 125 Moral and ethical aspects 117 Music 98 Religious aspects 95 Study and teaching 86 Islamic ethics 74 Study and teaching (Secondary) 70 History and criticism 62 Biological treatment 61 Study and teaching (Primary) 61 INDAMET 60 Lubrication and lubricants 51 Professional ethics 50 Environmental aspects 44 Business ethics 43 Malay language 42 Analysis 41 Attitudes 41 Education 41 Instruction and study 41 Research 40 Social aspects 40 Mathematics 37 Religious aspects Islam 37 History 31