F W THE EXTENT OF SOIL EROSION; REGIONAL COMPARISONS - WITZENHAUSEN DITSL 1997 - 201 0 0 0 0 ISBN: 3-980-1686-1-1 Source: 89-143 Subjects--Personal Names: CHROMEC Subjects--Topical Terms: TECHNOLOGY(APPLIED SCIENCES) LC Class. No.: S 625 .C65