Afforestation of agricultural land proceedings of a Workshop in the Community Programme of Research and Technological Development in the Field of Competitiveness of Agriculture and Management of Agricultural Resources (1989 - 93), held in Brussels (Belgium) on 12 and 13 December 1991 [publ. by the Commission of the European Communities, Directorate-General XII Telecommunications, Information Market and Exploitation of Research]. Ed. by K.-R. Volz ...