| 000 | 00424 am a2200121 a 4500 | ||
|---|---|---|---|
| 100 | 1 | _aPschorn-Walcher, H., Schroder, D., Elchhorn, O. | |
| 245 | 1 | _aRecent attempts at biological control of some canadian forest insect pests | |
| 260 |
_aSwitzeriand _c1968 |
||
| 300 | _a1-177 p. | ||
| 942 |
_2udc _cB |
||
| 440 | _aBiological, Insect Commonwealth institute of biological control. Technical Bulletin No. 11 | ||
| 901 | _aS51886 | ||
| 999 |
_c110447 _d110447 |
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