TY - CONF A1 - Holz, Klaus-Peter A1 - Hildebrandt, Gerald T1 - Virtual Laboratories - Some Considerations from Practical Experience KW - ICT KW - CSCW KW - CSCL KW - e-learning Y1 - 2004 UR - https://opus4.kobv.de/opus4-UBICO/frontdoor/index/index/docId/1734 ER -