{"source":"book","style":"apa","contributors": [{"function":"author","last":"Humboldt","first":"Alexander","middle":"von,"},{"function":"author","last":"Ideler","first":"Julius","middle":"Ludwig,"} ],"pubtype": {"main": "pubnonperiodical"},"pubnonperiodical": {"title":"Kritische untersuchungen uber die historische entwickelung der geographischen kenntnisse von der Neuen welt und die fortschritte der nautischen astronomie in dem 15ten und 16ten jahrhundert,","publisher":"Nicolai","city":"Berlin","year":"1836"},"datasource":"/z-wcorg/","datasource":"http://www.worldcat.org","oclc":"287693"}