Items where Author is "Hummel, Hans"
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Koper, Rob and Pannekeet, Kees and Hendriks, Maaike and Hummel, Hans (2004) Building communities for the exchange of learning objects: theoretical foundations and requirements. Association for Learning Technology Journal, 12 (1). pp. 21-35. ISSN 0968-7769 (print)/1741-1629 (online)