00693cam a22002291 4500 agr60000310 DLC 20260227111020.0 730329s1960 dcua f000 0 eng agr60000310 (OCoLC)593033 DLC NhD OCoLC OYesA DLC premarc S591 .A56 1960 631.44 United States. Soil Conservation Service. Soil classification: a comprehensive system [prepared by] soil survey staff. 7th approximation. [Washington] 1960. v, 265 p. illus. 28 cm. Bibliographical footnotes. Soils Classification. 11734 11734