United States Department of Agriculture, & Natural Resources Conservation Service. (1996). Soil survey methods manual: The soil survey analytical continuum. Lincoln: National Soil Survey Center.
Chicago Style CitationUnited States Department of Agriculture, i Natural Resources Conservation Service. Soil Survey Methods Manual: The Soil Survey Analytical Continuum. Lincoln: National Soil Survey Center, 1996.
Cita MLAUnited States Department of Agriculture, i Natural Resources Conservation Service. Soil Survey Methods Manual: The Soil Survey Analytical Continuum. Lincoln: National Soil Survey Center, 1996.
Atenció: Aquestes cites poden no estar 100% correctes.