Conference proceedings still available
The influential book of the proceedings of the 2003 conference is still available: Integrating Content and Language: Meeting the challenge of a multilingual university. Wilkinson, R. (Ed.). Maastricht: Maastricht University, 2004. Also the proceedings of the 2006 conference: Researching Content and Language Integration. Wilkinson, R. & Zegers, V. (Eds.). Maastricht: Maastricht University. Order these from C.Kraft@maastrichtuniversity.nl

