Der Katholizismus in Deutschland und der verlag Herder : 1801-1951. (Herder,, 1951)
Keywords: Cattolicesimo - Germania. (OLS)http://semarc/subject/12049; Herder <casa editrice>. (OLS)http://semarc/subject/58088; Germania - Storia religiosa - Sec. 19.-20. (OLS)http://semarc/subject/58087