0250-5460 0250-5460 S0250-54602021000300126 10.34098/2078-3949.38.3.4 Bolivia 00 08 2021 00 08 2021 38 3 126 132

1 2006 2 1997 61 61 4-10 3 2003 4 2019 36 4 4 180-9 5 1993 6 1959 23 23 146-9 7 1960 2nd 8 1982 9 1980 10 1965 16 16 467-84 11 1990 12 2005 22 1 1 19-26