1. An overview of the National Uranium Resource Evaluation Hydrogeochemical and Stream Sediment Reconnaissance Program;Bolivar,1980
2. Geochemical Atlas of Northern Fennoscandia;Bolviken,1987
3. Regional Geochemical Atlas, Shetland;Bowie,1978
4. Regional Geochemical Atlas, Orkney;Bowie,1978
5. Geochemical Maps of the Federal Republic of Germany;Fauth,1985