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| Lakes and water management : Proceedings of the 30 Years Jubilee Symposium of the Finnish Limnological Society, held in Helsinki, Finland, 22-23 September 1980 | | kirja | Helsinki, hydrologia, kokoukset, konferenssit, limnologia | DR W. Junk Publishers | The Hague, Boston, London | 1982 | 222 | 90-6193-758-2 | Developments in Hydrobiology 7 | | H-Limnologia, isokokoiset |