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Bodemkundige Informatie Systeem (BIS) Nederland
2.
Proceedings of the workshop on land evaluation for forestry : international workshop of the IUFRO/ISSS, Wageningen, the Netherlands, November 10-14, 1980
Land evaluation for land - use planning and conservation in sloping areas : international workshop, Enschede, The Netherlands, 17 - 21 December 1984