00363nam a2200121Ia 450000500170000000800410001705000190005810000280007724500660010525000080017126000390017965000230021820251229175257.0251229s9999    xx            000 0 und d  aS 623 .S6 1981  aSchwan, G. O...[et al.] 0aSoil and water conservation engineeringcG. O...[et al Schwan  a3rd  aNew Yorkb John Wiley & Sonsc1981  aSoil Conservations