{"source":"book","style":"apa","contributors": [{"function":"author","last":"Haydn","first":"Joseph"} ],"pubtype": {"main": "pubnonperiodical"},"pubnonperiodical": {"title":"Duett fur Violine und Violoncello.","publisher":"Rob. Forberg","city":"Bonn","year":"uuuu"},"datasource":"/z-wcorg/","datasource":"http://www.worldcat.org","oclc":"503399"}