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 |