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Social change, Sociology, Communities, Social structure

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Journal Article

Zawacki-Richter, O., Baecker, E., & Hanft, A. (2010). Validation of competencies in e-portfolios: A qulalitative analysis. The International Review of Research in Open and Distance Learning, 12(1), 42-60. Retrieved from

Arnold, D. (2004). Art history: A very short introduction. New York, NY: Oxford University Press.

Clark, L. (2000, November 11). The lost Inca Empire. Retrieved from