1390-9274 1390-9274 S1390-92742018000500229 10.18537/est.v007.n014.a10 Spain Ecuador 00 10 2018 00 10 2018 7 229 254

2008 1982 2015 2011 2016 2011 2015 27-35 2009 2016 2010 2011 2013 2008 222-5 2011 14 15-38 1997 3 37-51 2012 2012 2015 2016 57-68 2017 2017 24 101-16 2017 7 308-27 2016 7 164-76 UNESCO 1999 2011 UNESCO 2015 2013 Calgary, Canada 2010 2009 WHITRAP 2016 WHITRAP, y UNESCO