1. Nuclear Techniques in Exploration, Extraction and Processing of Mineral Resources;Watt;IAEA-SM-216/103,1977
2. Nuclear Techniques in Geochemistry and Geophysics;Watt,1976
3. Donhoffer D. K. and Furuta, T. Reference 1, IAEA-SM-216/1, Vienna
4. Int. Conf. and Exhibition on Industrial Measurement and Control by Radiation Techniques;Williams,1972
5. Lundán A. Outokumpu Oy, Finland, private communication (1976).