Hypertrophic ecosystems : S.I.L. Workshop on Hypertrophic Ecosystems held at Vaxjo, Septemebr 10-14, 1979 - S.I.L. Workshop on Hypertrophic Ecosystems (1979 : Vaxjo, Sweden); Barica, J. (Jan); Mur, L. R. (Luuc R.) (The Hague : W. Junk, 1980)
Keywords: Eutrophication -- Congresses; Lake ecology -- Congresses