2310-0265 2310-0265 S2310-02652021000200067 10.53287/rqla9910zy25i Bolivia 00 11 2021 00 11 2021 9 2 67 83

1974 1998 1997 1988 1-115 2006 141-63 2006 1 1 1 1-7 2008 13-58 2008 1 109-20 2009 348 2000 7 2000 b 2004 23-67 2005 2002 8 1998 159-77