1990-8644 1990-8644 S1990-86442019000300222 Colombia Cuba 00 09 2019 00 09 2019 15 68 222 229

2009 3 2016 Colombia. Ministerio de Educacion Nacional 1998 1993 1 81-102 1995 8 2 2 117-24 1992 2001 2008 41 4 4 433-52 2012 2010 12 222-39 2007 3 2 2 41-60 1977 2005 2010 14 1 1 1409-42-58 2010 61 3 3 248-60