10 books
History of the Christian Church, Vol. 3
Lehrbuch Der Kirchengeschichte, Vol. 2
Lehrbuch Der Kirchengeschichte, Vol. 3
Lehrbuch Der Kirchengeschichte, Vol. 1
History of the Christian Church, Vol. 1
History of the Christian Church Volume 2
Lehrbuch Der Kirchengeschichte (3 )
History of the Christian Church; A.D. Reformation and Counter-Reformation Volume 3
History of the Christian church
History of the Christian Church Volume 1