Halpern, O. W. (1956). Zur Konstitution des Plumierids.
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Tohutoru Kātū Chicago (17th ed.)
Halpern, Otto Werner. Zur Konstitution Des Plumierids. Zürich, 1956.
I tāruatia paitia ki te papatopenga
Kua rahua te tārua ki te papatopenga
Tohutoro MLA (9th ed.)
Halpern, Otto Werner. Zur Konstitution Des Plumierids. 1956.
I tāruatia paitia ki te papatopenga
Kua rahua te tārua ki te papatopenga
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