Tohutoro APA (7th ed.)
Halpern, O. W. (1956). Zur Konstitution des Plumierids.
Tohutoru Kātū Chicago (17th ed.)
Halpern, Otto Werner. Zur Konstitution Des Plumierids. Zürich, 1956.
Tohutoro MLA (9th ed.)
Halpern, Otto Werner. Zur Konstitution Des Plumierids. 1956.
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