Walker, Edmund. "Key to the Families of Anisoptera".
The Odonata of Canada and Alaska: Volume Two, Part III: The Anisoptera–Four Families, Toronto: University of Toronto Press, 1958, pp. 12-14.
https://doi.org/10.3138/9781442654198-005
Walker, E. (1958). Key to the Families of Anisoptera. In
The Odonata of Canada and Alaska: Volume Two, Part III: The Anisoptera–Four Families (pp. 12-14). Toronto: University of Toronto Press.
https://doi.org/10.3138/9781442654198-005
Walker, E. 1958. Key to the Families of Anisoptera.
The Odonata of Canada and Alaska: Volume Two, Part III: The Anisoptera–Four Families. Toronto: University of Toronto Press, pp. 12-14.
https://doi.org/10.3138/9781442654198-005
Walker, Edmund. "Key to the Families of Anisoptera" In
The Odonata of Canada and Alaska: Volume Two, Part III: The Anisoptera–Four Families, 12-14. Toronto: University of Toronto Press, 1958.
https://doi.org/10.3138/9781442654198-005
Walker E. Key to the Families of Anisoptera. In:
The Odonata of Canada and Alaska: Volume Two, Part III: The Anisoptera–Four Families. Toronto: University of Toronto Press; 1958. p.12-14.
https://doi.org/10.3138/9781442654198-005
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