1. Geology, Resources and Society;Menard,1974
2. The Earth Sciences,1963
3. How much of the rocks and oceans for power? Exploiting the uranium-thorium fission cycle;Lewis;Atomic Energy of Canada Ltd report AECL-1916/DM-72,1964
4. Energy in the future — the role of fission and fusion;Lewis;Proceedings of the Royal Scoiety, Edinburgh,1972
5. Estimated costs of processing granites for the recovery of thorium and uranium;Hurst;Oak Ridge National Laboratories report ORNL-3988, TN, USA,1966