Helson, G.A.H. 1971: Insect pests. Poultry house flies. New Zealand Journal of Agriculture 122: 63
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| Helson, G.A.H. 1971: Insect pests. Poultry house flies. New Zealand Journal of Agriculture 122: 63 |
| Helson, G.A.H. 1971: Insect pests. Poultry house flies. New Zealand Journal of Agriculture 122: 63 |