Author,Title,Edition,Publisher,Year,Series,Number,ISBN,ISSN,URL
"Bullmann, Franz G.","Die rheinischen Orgelbauer, Kleine, Roetzel, Nohl",,Musikverlag E. Katzbichler,1974,Schriften zur Musik,,3873970074,,https://cir.nii.ac.jp/crid/1130282272568360832