{"source":"book","style":"apa","contributors": [{"function":"author","last":"Grassi","first":"Giovanna"} ],"pubtype": {"main": "pubnonperiodical"},"pubnonperiodical": {"title":"Union catalogue of printed books of 15th, 16th and 17th centuries in European astronomical observatories","publisher":"Vecchiarelli","city":"Manziana, Roma","year":"1989"},"datasource":"/z-wcorg/","datasource":"http://www.worldcat.org","oclc":"20561964"}