Trace elements in the environment a symposium by the Division of Water, Air and Waste Chemistry at the 162nd meeting of the American Chemical Society, Washington, D. C., Sept. 15, 1971 - Kothny, Evaldo L; American Chemical Society. Division of Water, Air and Waste Chemistry (Washington, D.C. American Chemical Society, 1973)
Includes bibliographical references.
Keywords: Trace elements -- Environmental aspects -- Congresses; Geochemistry -- Congresses