Report of the meeting on Soil Classification and Survey of the Europ ean Commission on Agriculture held in Helsinki 1971 - Working Party on Soil Classification and Survey of the European Comm ission on Agriculture 1971 : Helsinki); Food and Agriculture Organisation of United Nations European Comm ission on Agriculture; United Nations Educational Scientific and Cultural Organisation. European Comm ission on Agriculture (Rome : Food and Agriculture Organisation of United States)
Keywords: Soil surveys