0379-3982 0379-3982 S0379-39822016000500003 10.18845/tm.v29i5.2513 Costa Rica 00 02 2016 00 02 2016 29 3 13

1998 2005 1987 1985 2000 1985 2003 1976 1974 1988 1974 2006 54 1998 46 1986 2006 2000