1816-8949

1816-8949

S1816-89492018000200055

10.18004/anales/2018.051(02)55-068

Paraguay

Paraguay

Paraguay

Paraguay

00 08 2018

00 08 2018

51 2 55 68

1

2015

2

2016

3

4

2017

5

2016

6

2007

7

2017

8

2009 24

217-28

9

2009

10

2006

11

2017 7 2 2

12

2012

13

2007

14

2010

15

2011