UGIS - a University GIS Network around the Baltic SeaErlingsson, UlfGIS-Baltic Sea States '93 : exhibition, conference, Tallinn, Estonia, 29 November - 1 December : proceedings1994 / p. 164-168

UGIS - a University GIS Network around the Baltic SeaErlingsson, UlfGIS-Baltic Sea States '93 : exhibition, conference, Tallinn, Estonia, 29 November - 1 December 1993 : abstract book, catalogue1993 / p. 45-46