Buol, S. W. Soil genesis and classification / S.W. Buol, F.D. Hole, R.J. McCracken - 2nd ed. - Ames, Iowa : The Iowa State University Press, 1980 - viii , 404 p. : ill. ; 24 cm. Includes bibliographical references and indexes ISBN: 081381460X LCCN: 79-015992 Subjects--Topical Terms: Soil scienceSoil formationSoil--Classification