@book{Kahlert2012, author = {Helmut Kahlert}, title = {\"Dem Uhrenfreund zuliebe\". Verstreute Beitr{\"a}ge zur Geschichte der Uhr}, editor = {Johannes Graf}, publisher = {Deutsches Uhrenmuseum}, address = {Furtwangen}, isbn = {978-3-922673-31-6}, pages = {212}, year = {2012}, language = {de} }