United States Department of Agriculture, & Natural Resources Conservation Service. (1996). Soil survey methods manual: The soil survey analytical continuum. Lincoln: National Soil Survey Center.
Styl ChicagoUnited States Department of Agriculture, a Natural Resources Conservation Service. Soil Survey Methods Manual: The Soil Survey Analytical Continuum. Lincoln: National Soil Survey Center, 1996.
Citace podle MLAUnited States Department of Agriculture, a Natural Resources Conservation Service. Soil Survey Methods Manual: The Soil Survey Analytical Continuum. Lincoln: National Soil Survey Center, 1996.
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