1. Adamson, A.W. 1976. Physical chemistry of surfaces, 3d ed. Wiley, NY.
2. Alberts, J.J., J.E. Schindler, R.W. Miller, and D.E. Nutter. 1974. Elemental mercury evolution mediated by humic acid. Science 184:895–897.
3. Alberts, J.J., J.E. Schindler, D.E. Nutter, and E. Davis. 1976. Elemental infrared spectrophotometric and electron spin resonance investigations of non-chemically isolated humic material. Geochim. Cosmochim. Acta 40:369–372.
4. Baes, A.U. 1983. Exchange of divalent cations in an acid-washed peat and a polycarboxylate resin. M.S. thesis, Univ. of Minnesota.
5. Bartlett, R., and B. James. 1979. Behavior of chromium in soils. III. Oxidation. J. Environ. Qual 8:31–35.