@book{ 0-161913926X, title = {Franz Ackermann: mental maps; [aus Anlaß der Ausstellung im Portikus Frankfurt am Main, vom 8. Februar - 6. April 1997]}, author = {Ackermann, Franz and Fricke, Harald}, editor = {Fricke, Harald}, address = {Frankfurt am Main}, publisher = {}, year = {1997}, isbn = {3928071297}, isbn = {9783928071291}, language = {German}, language = {English}, note = {Text in dt. u. engl}, url = {https://katalog.gfzk.de/Record/0-161913926X} }