0001-6002 0001-6002 S0001-60022017000200073 Costa Rica 00 06 2017 00 06 2017 59 2 73 74

1 2013 253-64 2 1971 19 241-9 3 1992 21 782-7 4 2008 36 150-63 5 1980 23 191-3 6 1981 24 141-2 7 2003 31 1127-42 8 2016 30 63-9 9 1998 31 95-8 10 2008 41 202-4 11 2009 12 25-8