@book{ 0-1156427169, title = {Lehrbuch der Orgelbaukunst}, author = {Töpfer, Johann Gottlob and Smets, Paul}, editor = {Smets, Paul}, address = {Mainz}, publisher = {Rheingold-Verl.}, year = {1955}, edition = {4. u. 5. Aufl.}, language = {German}, url = {https://katalog.ub.uni-leipzig.de/Record/0-1156427169} }