{"source":"book","style":"apa","contributors": [{"function":"author","last":"Agricola","first":"Georg"},{"function":"author","last":"Hoover","first":"Herbert"},{"function":"author","last":"Hoover","first":"Lou","middle":"Henry,"} ],"pubtype": {"main": "pubnonperiodical"},"pubnonperiodical": {"title":"De re metallurgia","publisher":"Mining Magazine","year":"1912"},"datasource":"/z-wcorg/","datasource":"http://www.worldcat.org","oclc":"277791619"}