0120-5307

0120-5307

S0120-53072021000200001

10.17533/udea.iee.v39n2e01

Portugal

00 08 2021

00 08 2021

39 2

1

World Health Organization

2

2020 180 9 9

1156-63

3

United Nations Educational, Scientific and Cultural Organization 2020

4

2021 8 1 1

133-41

5

2020 5

582882

6

2021 3

218-26

7

2020 28 108 108

545-54

8

2020

1-4

9

2021 105

101718

10

2020 3 1 1

7-16

11

2020 5 4 4