2224-7920 2224-7920 S2224-79202019000200027 Ecuador Cuba 00 08 2019 00 08 2019 31 2 27 33

2016 1997 FAO 1997 2da 2015 2013 93 4 4 821-6 2013 2017 28 2 2 293-8 2018 145 1 1 51-4 R versión 3.4.4. 2018 2016 2013 24 1 1 16-24 2015 26 1 1 77-85 2013 36 1 1 19-24 1964 20 4 4 818-26 2011 2015 76 2 2 393-5 2015 26 2 2 182-8