1992-8238 1992-8238 S1992-82382019000200019 Angola Cuba Cuba 00 12 2019 00 12 2019 69

2004 2014 1999 2016 1981 2002 2008 Everest 2003 2007 2015 1998 MINED 1979 Ministerio de Educación 2017 1998 2000 2014 2016 1999 2013