@book{ 0-1117613410, title = {Spanische Meisterzeichnungen}, author = {Gradmann, Erwin}, editor = {Gradmann, Erwin}, address = {Frankfurt a. M.}, publisher = {Prestel}, year = {1939}, language = {German}, url = {https://katalog.ub.uni-leipzig.de/Record/0-1117613410} }