000 00312 am a2200121 a 4500
100 1 _aWalker, R.H., Brown, P.E.
245 1 _aSoil erosion in lowa
260 _aAmes
_c1936
300 _a1-45 p.
942 _2udc
_cB
440 _aSoil Iowa Agricultural Economics Station. Special Report No. 2
901 _aS53938
999 _c111945
_d111945