Walker, Edmund. "Family Cordulegastridae".
The Odonata of Canada and Alaska: Volume Two, Part III: The Anisoptera–Four Families, Toronto: University of Toronto Press, 1958, pp. 289-308.
https://doi.org/10.3138/9781442654198-009
Walker, E. (1958). Family Cordulegastridae. In
The Odonata of Canada and Alaska: Volume Two, Part III: The Anisoptera–Four Families (pp. 289-308). Toronto: University of Toronto Press.
https://doi.org/10.3138/9781442654198-009
Walker, E. 1958. Family Cordulegastridae.
The Odonata of Canada and Alaska: Volume Two, Part III: The Anisoptera–Four Families. Toronto: University of Toronto Press, pp. 289-308.
https://doi.org/10.3138/9781442654198-009
Walker, Edmund. "Family Cordulegastridae" In
The Odonata of Canada and Alaska: Volume Two, Part III: The Anisoptera–Four Families, 289-308. Toronto: University of Toronto Press, 1958.
https://doi.org/10.3138/9781442654198-009
Walker E. Family Cordulegastridae. In:
The Odonata of Canada and Alaska: Volume Two, Part III: The Anisoptera–Four Families. Toronto: University of Toronto Press; 1958. p.289-308.
https://doi.org/10.3138/9781442654198-009
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