| 000 | 00436nam a2200145Ia 4500 | ||
|---|---|---|---|
| 008 | 130223s9999 xx 000 0 und d | ||
| 245 | _aBreeding efficiency in your herd - Do you cows produce a calf a year | ||
| 260 | _aPennsylvania | ||
| 260 | _bPennsylvania Agricultural Experiment Station | ||
| 260 | _c1959 | ||
| 300 | _a1 sheet | ||
| 440 | _aPennsylvania Agricultural Experiment Station | ||
| 901 | _pS823 | ||
| 942 |
_cB _2udc |
||
| 999 |
_c117038 _d117038 |
||