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
"In 1971 we continued thls cooperative attempt to detect and measure year-to-year changes in numbers of birds (chiefly songbirds)"--Introd.
Permanent link to this Catalogue record:
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| Department/Agency | Canada. Environment Canada. Canadian Wildlife Service. |
|---|---|
| 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. |
| Variant title | Étude collective des populations d'oiseaux nicheurs du Canada en 1971 |
| Series title | Progress notes ; no. 26 = Cahiers de biologie ; n° 26 |
| Publication type | Series - View Master Record |
| Language | Bilingual-[English | French] |
| Format | Electronic |
| Electronic document | |
| Note(s) | "May 1972." Digitized edition from print [produced by Environment and Climate Change Canada]. Text in English and French. |
| Publishing information | Ottawa : Canadian Wildlife Service = Service canadien de la faune, 1972. |
| Author / Contributor | Erskine, Anthony J., 1931- |
| Description | 29, [2] p. |
| Catalogue number |
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| Subject terms | Birds Surveys |
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