1815-7696 1815-7696 S1815-76962020000300457 Cuba 00 09 2020 00 09 2020 18 3 457 471

2015 1995 2019 22 2 2 2015 2017 1967 First edition 2009 1995 2013 2004 2017 2011 2014 2012 1989 2 2019 15 67 67 354-9