Historical development of the Natural Radiation Environment Symposia (A.C. George).
Understanding health risks from low doses of ionizing radiation (D.G. Thomassen, A. Patrinos).
The significance of the natural environment in radiation protection (F. Steinhäusler).
The theory of cosmic-ray and high-energy solar-particle transport in the atmosphere (K. O'Brien).
Capabilities and limitations of high-resolution gamma spectrometry in environmental research
Radon decay products in outdoor air (J. Porstendörfer, M. Gründel).
Contribution of animal experimental data for the risk assessment of exposure to radon decay products (G. Monchaux).
On the exposure circumstances and some further risk estimates regarding leukemia in ages 0-19 years and exposure to ionizing radiation in homes of uranium-containing alum shale-based concrete (G. Akerblom et al.).
The implementation in national legislation of title vii of the council directive 96/29/Euratom: Some general remarks and the case of Italy (S. Risica, F. Bochicchio, C. Nuccetelli).
Exposure potential of depleted uranium ammunition in the environment - a review (J.P. McLaughlin).
3. Radioactivity measurements, releases and dosimetry.
Changes in terrestrial natural radiation levels over the history of life (P.A. Karam, S.A. Leslie).
Gamma ray direction finder (K. Fujimoto, Y. Noda).
Continuous measurement of environmental gamma radiation using a Ge semiconductor detector and 222Rn concentration in air (T. Ichiji, T. Hattori).
Uranium concentrations and isotopic ratios in Austrian drinking waters (M. Gegner, K. Irlweck).
Natural radionuclides in radiu