The co-operative Breeding Bird Survey in Canada, 1971 / by Anthony J. Erskine = Étude collective des populations d'oiseaux nicheurs du Canada en 1971 / par Anthony J. Erskine.: CW69-9/26-PDF
« En 1971, nous avons continué l'effort collectif en vue de déceler et de mesurer des variations annuelles du nombre des oiseaux (surtout des oiseaux chanteurs) »--Introd.
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| Title | The co-operative Breeding Bird Survey in Canada, 1971 / by Anthony J. Erskine = Étude collective des populations d'oiseaux nicheurs du Canada en 1971 / par Anthony J. Erskine. |
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| Publication type | Monograph - View Master Record |
| Language | Bilingual-[English | French] |
| Format | Digital text |
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| Parallel description | [English] |
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| Description | 29, [2] p. |
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