Planning of the national mapping under present conditions - but for the futureSkak-Nielsen, KristianGIS-Baltic Sea States '93 : exhibition, conference, Tallinn, Estonia, 29 November - 1 December : proceedings1994 / p. 265-268

Planning of the national mapping under present conditions - but for the futureSkak-Nielsen, KristianGIS-Baltic Sea States '93 : exhibition, conference, Tallinn, Estonia, 29 November - 1 December 1993 : abstract book, catalogue1993 / p. 67