{"source":"book","style":"apa","contributors": [{"function":"author","last":"Greenleaf","first":"Benjamin"} ],"pubtype": {"main": "pubnonperiodical"},"pubnonperiodical": {"title":"Introduction to the national arithmetic ...","publisher":"R.S. Davis, etc., etc.","city":"Boston","year":"1851"},"datasource":"/z-wcorg/","datasource":"http://www.worldcat.org","oclc":"1194270591"}