Walker, Edmund. "The Zygoptera-Damselflies".
The Odonata of Canada and Alaska: Volume One, Part I: General, Part II: The Zygoptera–Damselflies, Toronto: University of Toronto Press, 1953, pp. 61-65.
https://doi.org/10.3138/9781442654181-004
Walker, E. (1953). The Zygoptera-Damselflies. In
The Odonata of Canada and Alaska: Volume One, Part I: General, Part II: The Zygoptera–Damselflies (pp. 61-65). Toronto: University of Toronto Press.
https://doi.org/10.3138/9781442654181-004
Walker, E. 1953. The Zygoptera-Damselflies.
The Odonata of Canada and Alaska: Volume One, Part I: General, Part II: The Zygoptera–Damselflies. Toronto: University of Toronto Press, pp. 61-65.
https://doi.org/10.3138/9781442654181-004
Walker, Edmund. "The Zygoptera-Damselflies" In
The Odonata of Canada and Alaska: Volume One, Part I: General, Part II: The Zygoptera–Damselflies, 61-65. Toronto: University of Toronto Press, 1953.
https://doi.org/10.3138/9781442654181-004
Walker E. The Zygoptera-Damselflies. In:
The Odonata of Canada and Alaska: Volume One, Part I: General, Part II: The Zygoptera–Damselflies. Toronto: University of Toronto Press; 1953. p.61-65.
https://doi.org/10.3138/9781442654181-004
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