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Madrid: Ed. Gredos, 1975
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Madrid: Ed. Gredos, 1966
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UNED - Universidad Nacional de Educacion a Distancia, 2021
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JSTOR, 1968
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JSTOR, 1968
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Editorial Universidad de Almeria, 2013
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MDPI AG, 2016
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Wiley, 2016
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MDPI AG, 2015
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Informa UK Limited, 2008
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Public Library of Science (PLoS), 2013
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Springer Science and Business Media LLC, 2022
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Elsevier BV, 2020
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Elsevier BV, 2013
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Springer Science and Business Media LLC, 2023
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Oxford University Press (OUP), 2019
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Elsevier BV, 2018
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Springer Science and Business Media LLC, 2021
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Elsevier BV, 2018
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Oxford University Press (OUP), 2018