Producir software libre de código libre
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(http://collection.openlibra.com.s3.amazonaws.com/covers/2012/04/Producir-Software-de-C%C3%B3digo-Abierto_Como-Llevar-a-Buen-Puerto-un-Proyecto-de-C%C3%B3digo-Libre-350x459.jpg)
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descargar (https://mega.co.nz/#!ipogwATI!KBUmXMCTQkwDIfK34rpms3i8txKc0orJ6VvCuY5N22A)