FreksaChristian

Spatial cognition IV: reasoning,action,interaction: international conference spatial cognition 2004,Frauenchiemsee,.. by: FreksaChristian; KnauffMarkus; Krieg-BrucknerBernd [et al] (Language materials, printed)

Geographic information science: third international conference,GIScience 2004,Adelphi,MD,USA,.. by: EgenhoferMax J.; FreksaChristian; MillerHarvey J. (Language materials, printed)