{"tema_id":"4556","string":"Rocas sil\u00edceas","created":"2009-06-19 13:14:47","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":"552.55\n553.57 "}]}