| 000 | 00375 am a2200121 a 4500 | ||
|---|---|---|---|
| 100 | 1 | _aHoffmann, C., Hammer, B.W. | |
| 245 | 1 | _aSome factors concerned in the fixation of nitrogen by azotobacter | |
| 260 |
_aMadison _c1910 |
||
| 300 | _a1-172 p. | ||
| 942 |
_2udc _cB |
||
| 440 | _aNitrogen Wisconsin Agricultral Experiment Station. Research Bulletin No. 12 | ||
| 901 | _aS50764 | ||
| 999 |
_c107964 _d107964 |
||