2414-8938 2414-8938 S2414-89382019000200099 10.30545/academo.2019.jul-dic.1 Paraguay 00 12 2019 00 12 2019 6 2 99 110

2003 1993 2010 1981 239-56 1934 2011 1990 1986 2009 1993 1998 1982 2010 2001 1993