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Se incide en la presencia del marketing pero aun no se da un concepto formal acerca de este.
Este periodo se divide en: identificación, funcionalista y preconceptual.
A list shows items. A timeline shows sequence.
Use Timetoast to make dates, milestones, and turning points easier to understand in a clear visual format. Timetoast is a timeline maker for work, school, research, and stories.