{"tema_id":"4274","string":"Carb\u00f3n - Minas y extracci\u00f3n","created":"2009-06-03 12:46:08","code":null,"notes":[{"@type":"Nota hist\u00f3rica","@lang":null,"@value":"Se puede usar con un subencabezamiento geogr\u00e1fico. "},{"@type":"Nota bibliogr\u00e1fica","@lang":null,"@value":"622.33 "}]}