1409-4258 1409-4258 S1409-42582021000100470 10.15359/ree.25-1.25 Cuba Cuba Cuba 00 04 2021 00 04 2021 25 1 470 491

2016 2017 18 18 23-37 2018 70 70 51-69 2019 1 1 1-18 2016 55 1 1 94-113 1980 1991 2014 18 2018 39 39 55-73 2004 2003 2015 2 4 4 7-13 2012 18 18 47-53 2006 2007 2001 2006 91 3 3 199-204 2018 57 2 2 143-62 2017 429-42 2011 111-8 2012 Ministerio de Educación de Cuba 2016 2017 409-21 2017 9 4 4 194-206 1989 75-85 2012 211-353 1973 2016 2004