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Martínez Espinoza, Carla Vanessa and Lumbi Sandoval, Dara Mileydi (2013) Effectiveness of children’s songs as a pedagogical tool to develop the listening and speaking skills on first-grade students at Germán Pomaresschool in San Sebastián de Yali municipality during the second semester 2020. Licenciatura thesis, Universidad Nacional Autónoma de Nicaragua, Managua.
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