{"tema_id":"2811","string":"Radio en navegaci\u00f3n","created":"2009-03-06 10:13:38","code":null,"notes":[{"@type":"Nota hist\u00f3rica","@lang":null,"@value":"Admitida diciembre 1999 "},{"@type":"Nota bibliogr\u00e1fica","@lang":null,"@value":"CDU 654.16 "}]}