| Annen tittel
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| Utgitt
| Bruxelles : : Union internationale pour la protection de la nature, , 1951.
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| Omfang
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| Opplysninger
| Contributions in French or English.. - Supplemented by: "Addendum" (viii, 151 p. 23 cm.) Published: Bruxelles, 1954. Call number: QH75.I5432
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| Emner
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