Français : Carte de répartition l'Écureuil de Douglas, avec l'ajout des frontières des états, provinces et territoires des États-Unis, le Canada et le Mexique
English: Geographical distribution of Douglas squirrel, with the addition of the borders of the states, provinces and territories of the United States, Canada and Mexico.
Date
Source
The Natural History of Canadian Mammals. 2012. Donna Naughton. Toronto : University of Toronto Press. ISBN:9781442644830
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