Estados Unidos. Soil Conservation Service, & Estados Unidos. Soil Conservation Service. (1975). Soil taxonomy: A basic system of soil classification for making and interpreting soil surveys (1. edición.). Washington: Departamento of Agriculture.
Chicago Style CitationEstados Unidos. Soil Conservation Service, and Estados Unidos. Soil Conservation Service. Soil Taxonomy: A Basic System of Soil Classification for Making and Interpreting Soil Surveys. 1. edición. Washington: Departamento of Agriculture, 1975.
MLA CitationEstados Unidos. Soil Conservation Service, and Estados Unidos. Soil Conservation Service. Soil Taxonomy: A Basic System of Soil Classification for Making and Interpreting Soil Surveys. 1. edición. Washington: Departamento of Agriculture, 1975.