- Sozialismus und soziale Bewegung
- Islam in Africa: Its Effects--Religious, Ethical and Social--Upon the People of the Country
- Islam in Africa; Its Effects--religious, Ethical and Social--upon the People of the Country
- Islam in Africa; Its Effects--Religious, Ethical and Social--Upon the People of the Country
- Islam in Africa: Its Effects--Religious, Ethical, and Social--upon the People of the Country