United States Dept. of Agriculture. Soil Survey Division. text bibliography dcu Washington, D.C.] U.S. Dept. of Agriculture For sale by the Supt. of Docs., U.S. G.P.O. [1993] 1993 monographic eng spa

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xix, 437 p. ill. (some col.) 24 cm. by Soil Survey Division staff. "This is a revision and enlargement of U.S. Department of Agriculture Handbook No. 18, the Soil survey manual, issued October 1962, and supersedes it." Includes bibliographical references (p. [345]-352) and index. Soil surveys Handbooks, manuals, etc S21 .A37 no. 18 631.4/7 A 1.76:18/993 A 1.76:18/993 94197103 IaDm 940331 20170829104021.0 213500