Lakes and water management : proceedings of the 30 years jubilee symposium of the Finnish Limnological Society, held in Helsinki, Finland, 22-23 September 1980 / edited by V. Ilmavirta, R.I. Jones, and P.-E. Persson. (Developments in hydrobiology ; 7)
Lakes and water management : proceedings of the 30 years jubilee symposium of the Finnish Limnological Society, held in Helsinki, Finland, 22-23 September 1980 / edited by V. Ilmavirta, R.I. Jones, and P.-E. Persson.