author = { Kunstgewerbe-Museum Köln Schaefer, Karl AND Clemens, Wilhelm },

title = { Die Sammlung W. Clemens },

publisher = {Marcan-Block-Verl.},

year = {1923},

address = { Köln a. Rh. },

url = { http://slubdd.de/katalog?TN_libero_mab2 }