| 000 | 00390 am a2200121 a 4500 | ||
|---|---|---|---|
| 100 | 1 | _aSpillman, W.J. | |
| 245 | 1 | _aUse of the exponential yield curve in fertilizer experiments | |
| 260 |
_aWashington _c1933 |
||
| 300 | _a1-67 p. | ||
| 942 |
_2udc _cB |
||
| 440 | _aYield, Curve, Fertilizer, Experiments United States Department of Agriculture. Technical Bulletin No. 348 | ||
| 901 | _aS50176 | ||
| 999 |
_c107076 _d107076 |
||