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Language: English
Volume 12 contains the following two contributions:
- Mosses collected from Koli, North Karelia, Finland by T. Koponen in 1964; habitats substrates, an estimation of frequencies and conservation / T. Koponen
- Mosses collected in Pisa Strict Nature Reserve in northern Finland by Aune and Timo Koponen in 1964-66; habitats, substrates, an estimation of frequencies and conservation / T. Koponen and T. Ulvinen
![Suomen Vesisammalkasvio [Aquatic Bryophytes of Finland]](http://mediacdn.nhbs.com/jackets/jackets_resizer_medium/51/51901.jpg?height=150&width=105)