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![Cover for Christoph Rensing · Open Learning and Teaching in Educational Communities: 9th European Conference on Technology Enhanced Learning, EC-TEL 2014, Graz, Austria, September 16-19, 2014, Proceedings - Lecture Notes in Computer Science (Paperback Book) [2014 edition] (2014)](https://imusic.b-cdn.net/images/item/original/995/9783319111995.jpg?christoph-rensing-2014-open-learning-and-teaching-in-educational-communities-9th-european-conference-on-technology-enhanced-learning-ec-tel-2014-graz-austria-september-16-19-2014-proceedings-lecture-notes-in-computer-science-paperback-book&class=scaled&v=1600169725)