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@inproceedings{WH98, author = {Thomas Walter and Hans Hänni}, title = {Telepoly - A Teleteaching Scenario supported by High-Speed Networks - Extension and Evolution}, booktitle = {In ED-MEDIA/ED-TELECOM 98 World Conference on Educational Multimedia and Hypermedia and on Educational Telecommunications, AACE}, pages = {1483--1489}, month = {Jun}, year = {1998} }