1659-3820 1659-3820 S1659-38202018000100132 10.18845/rc.v27i1-18.3890 Costa Rica 00 06 2018 00 06 2018 27 1 132 143

1996 1989 2016 6 2016 21A 1972 2016 22A 2016 4-5. 2016 25A 2013 2008 1995 2016