Não informado. (1918). Bulletin of the Biological Society of Washington. Biological Society of Washington.
Citace podle Chicago (17th ed.)Não informado. Bulletin of the Biological Society of Washington. Washington: Biological Society of Washington, 1918.
Citace podle MLA (8th ed.)Não informado. Bulletin of the Biological Society of Washington. Biological Society of Washington, 1918.
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