1. Blum, W.E.H. (1988): Problems of Soil Conservation.-Nature and Environment Series No. 39, Council of Europe, Strasbourg (english and french).
2. Blum, W.E.H. (1990): Soil Pollution by Heavy Metals-Causes, Processes, Impacts and Need for Future Actions.-Information Document-6th European Ministerial Conference of the Environment, Brussels, 11-12 October, 1990, 42 pp., Council of Europe, Strasbourg
3. Council of Europe (1972): European Soil Charter
4. Council of Europe (1990): Feasibility study on possible national and/or European actions in the field of soil protection-Report for the 6th European Ministerial Conference on the Environment-Brussels, October 11-12, 1990-MEN 6(90)2, Strasbourg (english and french)
5. Council of Europe (in preparation): Handbook of Soil Protection in Europe