Soil taxonomy : a basic system of soil classification for making and interpreting soil surveys.

by Soil Survey Staff.

2nd ed.

Washington, DC : United States Departament of Agriculture : Natural Resources Conservation Service, 1999.

869 p : ilustraciones (some col.) ; 2 maps ; 29 cm.

Serie: Agriculture Handbook ; nº 436

Two folded colored maps in pocket.

Includes bibliographical references and index.