000 00268nam a2200121Ia 4500
008 180721s9999 xx 000 0 und d
100 _a"Gustafson, A.F."
245 0 _aConservation of the soil
260 _bNil
260 _c2011
365 _b746.25
942 _cBK
999 _c144569
_d144569