1. The effects of air pollution on plants and soil;Agricultural Research Council,1967
2. Effects of air pollution on plants;Brandt,1962
3. The use of plants as indicators of air pollution;Heck;Int. J. Air Wat. Pollut.,1966
4. Beispiele forstlicher Interpretations-möglichkeiten falschfarbiger Luftbilder;Hildebrandt,1968
5. Remote sensing of the broadleaf trees under stress;Olson,1971