Cita APA

United States. Department of Agriculture. Agricultural Research Administration. (1974). Soil survey manual (Fourth draft).

Citación estilo Chicago

United States. Department of Agriculture. Agricultural Research Administration. Soil Survey Manual (Fourth Draft). EEUU, 1974.

Cita MLA

United States. Department of Agriculture. Agricultural Research Administration. Soil Survey Manual (Fourth Draft). EEUU, 1974.

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