Parra, M. C. (1998). Cálculo mental en la escuela primaria.
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Chicago Style (17th ed.) Citation
Parra, María Cecilia. Cálculo Mental En La Escuela Primaria. 1998.
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MLA (9th ed.) Citation
Parra, María Cecilia. Cálculo Mental En La Escuela Primaria. 1998.
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