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The Epistemology of Logic
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Ehlers, Ulf-Daniel (2004): Qualität im E-Learning aus Lernersicht. Grundlagen, Empirie und Modellkonstruktion subjektiver Qualität. Verlag für Sozialwissenschaften, Wiesbaden (ISBN 3-531-14235-6)
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386 Seiten, 69 Abbildung, 20 Tabellen, 32,90Euro

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