(1978). Soil taxonomy: A basic system of soil classification for making and interpreting soil surveys. U.S.Department of agriculture.
Stile di citazione ChicagoSoil Taxonomy: A Basic System of Soil Classification for Making and Interpreting Soil Surveys. United States: U.S.Department of agriculture, 1978.
Citazione MLASoil Taxonomy: A Basic System of Soil Classification for Making and Interpreting Soil Surveys. U.S.Department of agriculture, 1978.
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