000 00315nam a2200121Ia 4500
008 191031s9999 xx 000 0 und d
100 _aTroeh
245 0 _aSoil and water conservation for productiving and environmental protection
260 _bPrentice Hall
260 _c1980
365 _b212.79
942 _cBK
999 _c205850
_d205850