1. Proceedings of Workshop on Risks Associated with Human Intrusion at Radioactive Waste Disposal Sites;NEA,1989
2. On the statistical loss of long-period comets from the solar system;Hammersley,1961
3. The Causes of Progress;Todd,1987
4. Remote sensing of the Earth: A Synoptic View;Schott;Physics Today,1989
5. Background Studies: Human-Induced Effects on the Evolution of Shallow Land Burial Sites for Radioactive Waste Disposal;Dames;UK Government Department of Environment Research Report UKDoE/HMIP/RR87.130,1987