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| Utgitt
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| Omfang
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| Opplysninger
| "...papers delivered at the 14th enlarged plenum of the Commission for Nature Conservation of the Academy of Sciences of the Estonian S.S.R. ... to discuss the theme "Conservation of resources of inanimate nature and natural rarities in the Estonian S.S.R."" - Foreword. - Sammendrag på engelsk og russisk
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| Emner
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