Nordic symposium on forest water ecosystems held at Färna, Central Sweden, September 28–October 2, 1981

with special reference to Africa

Proceedings of an International Symposium held in Tihany (Hungary), 1–4 September 1987

Proceedings of the Second European Meeting on Littorinid Biology, Tjärnö Marine Biological Laboratory, Sweden, July 4–8, 1988

Proceedings of the Second International Symposium on Aquatic Obligochaete Biology, held in Pallanza, Italy, September 21–24, 1982

Proceedings of the 30 Years Jubilee Symposium of the Finnish Limnological Society, held in Helsinki, Finland, 22–23 September 1980