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Environmental effects of chlorine bleaching - facts neglected?.

by???: Lehtinen, Karl-Johan (1951- )

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V: Paperi ja puu. - ISSN 0031-1243. - 1992 : 9, s. 715-719
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Klooriton vaihtoehto kehitteillä.

by???: Nykänen, Eino.

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V: Metsämies. - ISSN 0355-6743. - 1991 : 6, s. 20-21
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