00750nam a2200193 a 450000500170000000800410001702000180005803500150007604100080009105000180009924501180011726000860023530000110032144001270033265000170045970000250047670000240050170000310052520260818113216.0                                          a3 9801686 1 1  a.b114128350 aeng  aS623 T66 v. 1 4aThe extent of soil erosion :bregional comparisons / [edited by Eckhard Baum, Peter Wolff and Michael A. Zobisch]  aWitzenhausen :bGerman Institute for Tropical and Subtropical Agriculture,c1989?  a201 p. 0aTopics in Applied Resource Management in the Tropics: a series on soil and water conservation and land use systems ;vv. 110aSoil erosion  aBaum, Eckhardc, ed.  aWolff, Peterc, ed.  aZobisch, Michael A.c, ed.