| 000 | 00435 a2200133 4500 | ||
|---|---|---|---|
| 100 | 1 | _aHeady, Earl O., Shaw, Russell | |
| 245 | 1 | _aResource returns and productivity coefficients in selected farming areas of Iowa, Montana and Alabama | |
| 260 |
_aIowa _c1955 |
||
| 300 | _a335-372 p. | ||
| 440 | _aIowa Agricultural Experiment Station. Research Buletin No. 425 | ||
| 650 | _aProductivity, Farming | ||
| 942 |
_2udc _cB |
||
| 901 | _a46122 | ||
| 999 |
_c55739 _d55739 |
||