000 00306nam a2200109Ia 45e0
008 181001s1982 xx 000 0 und d
100 _aZechar P.
245 0 _aSoil erosion
260 _aAmstondom
_bEver Sci.pub.
_c1982
300 _a547
942 _2ddc
_cBK
999 _c3867
_d3867