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ISSN: 1991-0177    frecuency : 4   format : Electrónica

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Number 4 Year 2020

8 articles in this issue 

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Pags. 5 - 10  

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Pags. 11 - 16  

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Pags. 17 - 23  

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Pags. 24 - 29  

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Pags. 30 - 36  

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Pags. 37 - 42  

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Pags. 43 - 49  

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Pags. 50 - 55