1. Metal Pollution in the Aquatic Environment;Förstner,1979
2. Metal Pollution in the Aquatic Environment;Förstner,1979
3. Incidence, Variability and Controlling Factors for Trace Elements in Natural Fresh Waters. Trace metals and Metal—Organic interactions in Natural Waters;Andelman;Ann Arbor Sci.,1973
4. Concentration of trace metals in river waters. A review;Wilson,1976
5. Short term variation of the chemical composition of the Niagara river in Inland Waters Directorate;Chan;Scientific Series, No. 90,1978