Advances in Databases 11th British National Conference on Databases, BNCOD 11, Keele, UK, July 7-9, 1993. Proceedings Worboys Michael F. Heftet / 1993 / Engelsk
Spatial Information Theory. Foundations of Geographic Information Science International Conference, COSIT 2003, Ittingen, Switzerland, September 24-28, 2003, Proceedings Kuhn Werner Heftet / 2003 / Engelsk
