00571nam a2200169Ia 4500008004100000082001600041100002600057245007800083260003700161300001000198600002400208600002400232650002200256942000700278952009900285999001700384140113s9999    xx            000 0 und d  a631.6.02 M0  a" Troch, Frederic R."  aSoil and water conservation for productivity and environmental protection  b"New york : Prentice-hall, 1980"  a718p.  a" Hobbs, J. Arthur"  a" Hobbs, J. Arthur"  aSoil conservation  cBK  00104070aKYMbKYMd2014-01-13l0o631.6.02 M0pKBK2579r2014-01-13 00:00:00w2014-01-13yBK  c63437d63437