000 00311nam a2200121Ia 4500
008 170101s1937 xx 000 0 und d
082 _a631.45 GUS
100 _aGustafson A. F.
245 0 _aConservation of the Soil
260 _aNew York
_bMcGraw Hill Book Co. Inc
_c1937
300 _a312 p.
942 _2ddc
_cB
999 _c87716
_d87716