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C. Cechinel, S. Sánchez-Alonso, M.-Á. Sicilia, and M. C. Mattos, "Descriptive Analysis of Learning Object Material Types in MERLOT," in Metadata and Semantic Research. vol. 108, S. Sánchez-Alonso and I. N. Athanasiadis, Eds., ed: Springer Berlin Heidelberg, 2010, pp. 331-341.

2010