1. Itaipu reservoir (Brazil);Agostinho,1994
2. Ketchikan laboratory studies disclose gulls are implicated in disease spread;Anonymous;Alaska's Health,1954
3. Present utilization and recommendations for management of tin-mine lakes in Malaysia;Arumugan;Mitt. Int. Verein. Limnol.,1994
4. Oil and African great lakes;Baker,1989
5. Lake Acidification in the United Kingdom 1800–1986,1988