Volume III of Marquart's Works - Church & Ministry - Some of the essays included are:
- Council of Churches
- Marks of the Church - Essay
- Evangelical Grace vs. Ecumenical Pressure
- Some Aspects of Healthy Church Life
- The Churchly Nature of the LCMS
- The Lutheran Doctrine of the Church
- The Church and Her Fellowship, Ministry, and Governance
- Congregational Church Government
- Ecumenism: Facts and Illusions
- The Marks of the Church for the Life of the World
