1. Anderson, V. G., The origin of the dissolved inorganic solids in natural waters with special reference to the O'Shannassy River catchment, Victoria. J. Proc. Australian Chem. Inst.8, 130?150 (1941).
2. Anderson, V. G., Some effects of atmospheric evaporation and transpiration on the composition of natural waters in Australia, J. Proc. Australian Chem. Inst.12, 41?68 and 83?98 (1945).
3. �ngstr�m, A. and H�gberg, L., On the content of nitrogen (NH4-N, and NO3-N) in atmospheric precipitation. Tellus4, 31?42 (1932).
4. Arens, K., Die kutikul�re Exkretion des Laubblattes. Jahrb. Wiss. Botan.80, 248?300 (1934).
5. Arens, K., Elimini�?o de sais t�xicos atrav�s da cut�cula foliar. Thesis, Faculdade Nacional de Filosofia, Rio de Janeiro (1950).