Penning de Vries, F. W. T. Soil erosion at multiple scales : principles and methods for assessing causes and impacts /ed. by F.W.T. Penning de Vries, F. Agus and J. Kerr - Oxon : CABI, 1998. - 390 p. : ilus. ISBN: 0851992900 LCCN: 80895 Subjects--Topical Terms: Erosión.Suelos--Degradación. Dewey Class. No.: 631.455 / P4