1. The stable isotopes of carbon as indicators of air pollution levels;Atkins,1971
2. 14C/12C ratios as tracers of urban pollution;Baxter,1975
3. Lamont radiocarbon measurements VIII;Broecker;Radiocarbon,1961
4. Determination of trace elements in plants by the X-ray fluorescence analysis for environmental pollution investigation;Florkowski;Int. J. appl. Rad. Isot.,1977
5. Changes in the forest environment in Southern Poland upon the influence of industrial emission;Grodzinska,1974