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2. Canter, L. W. and Gloyna, E. F.: 1967, Radioactivity Transport in Water - Transport of Cr-51 in an Aqueous Environment, Civil Engr. Dept., Univ. of Texas, Austin, Tex., U.S.A.
3. Chuecas, L. and Riley, J. P.: 1966, Anal. Chim. Act. 35, 240.
4. Copeland, R. A. and Ayers, J. C.: 1972, ?Trace Element Distributions in Water, Sediment, Phytoplankton, Zooplankton, and Benthos of Lake Michigan?, Envir. Res. Group Spec. Rep. 1.
5. EPA Proposed Criteria for Water Quality: 1973, U.S. Envir. Prot. Agen., Washington, D.C., U.S.A.