1. Albert, A., 1950, Quantitative studies of the avidity of naturally-occurring substances for metals. I. Amino-acids having only two ionizing groups, Biochem. J., 47: 531.
2. Anderegg, G., L’Eplattenier, F., and Schwarzenbach, G., 1963, Hydroxa¬mate complexes. 3. Iron III exchange between sideramines and complexones. A discussion of the formation constants of the hydroxamate complexes, Helv. Chim. Acta, 46: 1409.
3. Anderson, G.C., and Zeutschel, R.P., 1970, Release of dissolved organic matter by marine phytoplankton in coastal and offshore areas of the northeast Pacific Ocean, Limnol. Oceanogr., 15: 402.
4. Avakyan, Z.A., and Rabotnova, I.L., 1971, Comparative toxicity of free ions and complexes of copper with organic acids for Candida utilis, Mikrobiologiya, 49: 305.
5. Barber, R.T., 1973, Organic ligands and phytoplankton growth in nu trient-rich seawater, in: “Trace Metals and Metal-Organic Interactions in Natural Waters”, P.C. Singer,ed., Ann Arbor Science Publ., Ann Arbor, Michigan.