1. A study of two rocks;Ahrens;Geostand. Newsl.,1977
2. The Los Alamos Scientific Laboratory approach to hydrogeochemical and stream sediment reconnaissance for uranium in the United States;Bolivar,1981
3. Geochemical atlas of Northern Fennoscandia;Bölviken,1986
4. Focus on the use of soils for geochemical exploration in glaciated terrain;Bölviken,1979
5. Geochemical prospecting — retrospect and prospect;Boyle,1967