{"contributors":[{"last":"Keßler","middle":"Christoph","first":"Joseph","function":"author"},{"last":"Rehberg","first":"Willy","function":"author"}],"style":"apa","source":"book","book":{"":""},"oclc":"179987458","pubnonperiodical":{"year":"1900","volume":"","publisher":"Steingräber","city":"Leipzig","title":"16 [Sechzehn] Etüden für Pianoforte : aus Op. 20"},"datasource":"http:\/\/www.worldcat.org","pubtype":{"main":"pubnonperiodical"}}