Eutrophication: causes, consequences, correctives; proceedings of a symposium.

International Symposium on Eutrophication (1967 : University of Wisconsin)
Washington : National Academy of Sciences, 1969.

Man-made lakes : proceedings

McConnell, Ro.
London : Published for the Institute of Biology by Academic Press, 1966.

Transactions of the 6th Conference on the Biology of Inland Waters.

Soveshchanie po problemam biologii vnutrennikh vod (6th : 1957 : Leningrad, R.S.F.S.R.; Borok, Russia)
Jerusalem : Israel Program for Scientific Translations [available from the U.S. Dept. of Commerce, Clearinghouse for Federal Scientific and Technical Information, Springfield, Va.], 1969.