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AR-LpUBP |
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|a Valls y Anglés, Vicente
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|a Metodología de las ciencias naturales
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| 250 |
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|a 4a.ed.
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|a Buenos Aires :
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| 300 |
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|a Revista de pedagogía. Cuadernos de trabajo
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1 |
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|a Medina Bravo, M.
|9 26719
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