Forsberg Curt Forest water ecosystems Nordic symposium on forest water ecosystems hels at farna, central sweden, september 28 to october 2, 1981 - Hague Dr w junk publishers 1983 - v;163p. ISBN: 9061937647 Subjects--Topical Terms: Acidified lakesHumic acid lakeSwedish lakes Dewey Class. No.: 577.3 / FOR,ed.