GI-days 2003 - proceedings
The lectures of the GI-days 2003 are centralised and published in proceedings with the title "Geodaten- und Geodienste-Infrastrukturen - von der Forschung zur praktischen Anwendung" as edition no. 18 in the IfGIprints. The proceedings are available at the Institute for Geoinformatics of the University of Münster. They cost 20,- euro resp. 15,- euro (reduced price).
You can perform your order online here.