Soil survey - a basis for european soil protection : Soil and Groundwater Research Report I. proceedings of the meeting of European Heads of Soil Survey, 11 to 13 December 1989, Silsoe, UK
Hodgson Jm. M. (Vedecký redaktor)
Luxembourg : Commission of the European Communities , 1991. - v, 214 s. : obr., tab., 30 cm
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