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Edition:
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Brasil
Canada
Canada (français)
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ECOSUR
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Authors
Germán Martínez Velasco
Enseignant chercheur au Colegio de la Frontera Sur, ECOSUR
Iván Francisco Porraz Gómez
Profesor-Investigador, ECOSUR
Germán Martínez Velasco
Iván Francisco Porraz Gómez
