1. Galloway, J. N., Thornton, J. D., Norton, S. A., Volchok, M. L., and McLean, R. A. N.: 1982, Atm. Environ. 16, 1677.
2. Georgii, H.-W. and Pankrath, J.: 1982, Eds of Deposition of Atmospheric Pollutans, D. Reidel Publ. Co., Dordrecht, Holland.
3. Giot-Wirgot, P., Felten, V., and Marechal, P.: 1984, ?Remote Sensing of Forest Damage in Eastern Belgium?, O. L. J. Vanderborght (ed.), Belgian Research on Acid Deposition and the Sulfur Cycle, Symposium held at the Palace of Academies, Brussels, June 1984, Organized by the Belgian Committee of SCOPE.
4. Gravenhorst, G. and Höfken, K. D.: 1982, ?Concentration of Aerosol Constituents Above and Beneath a Beech and a Spruce Forest Canopy, in H. W. Georgii and J. Pankrath (eds.), Deposition of Atmospheric Pollutants, D. Reidel Publ., Co., Dordrecht, Holland.
5. Hosker, R. P. and Lindberg, S. E.: 1982, Atm. Environ. 16, 889.