| 000 | 00408nam a2200145Ia 4500 | ||
|---|---|---|---|
| 008 | 130223s9999 xx 000 0 und d | ||
| 100 | _aBarker, R., Heady, E.O. | ||
| 245 | _aEconomy of innovations in dairy farming and adjustments to increase resource ret | ||
| 260 | _aAmes | ||
| 260 | _c1960 | ||
| 300 | _a747-764 p. | ||
| 440 | _aIowa Agricultural Experiment S | ||
| 901 | _pS2180 | ||
| 942 |
_cB _2udc |
||
| 999 |
_c120751 _d120751 |
||