@book{WickelHartogh2011, author = {Wickel, Hans Hermann and Hartogh, Theo}, title = {Praxishandbuch Musizieren im Alter}, edition = {1. Aufl.}, publisher = {Schott Music}, address = {Mainz}, isbn = {978-3-7957-8747-9}, year = {2011}, language = {de} }