1. Raabe in neuer Sicht Author/Creator: Helmers, Hermann Publication/Creation: Stuttgart, Berlin : W. Kohlhammer, [1968] Format: Book Access & Availability: Loading
2. Die bildenden Mächte in den Romanen Wilhelm Raabes Author/Creator: Helmers, Hermann Publication/Creation: Weinheim,Bergstr : J. Beltz, 1960 Format: Book Access & Availability: Loading