{"source":"book","style":"apa","contributors": [{"function":"author","last":"Huygens","first":"Christiaan"} ],"pubtype": {"main": "pubnonperiodical"},"pubnonperiodical": {"title":"The celestial worlds discover'd","publisher":"Cass","city":"London","year":"1968"},"datasource":"/z-wcorg/","datasource":"http://www.worldcat.org","oclc":"40120"}