1. Determination of thorium and uranium in sedimentary rocks by two independent methods;Adams;Geochim. et Cosmochim. Acta,1958
2. Thorium to uranium ratios as indicators of sedimentary processes;Adams;Bull. Amer. Ass. Petrol. Geol.,1958
3. Mineralogy and chemistry of uranium-bearing black shales;Bates,1958
4. Radioactivity and organic content of some Palaeozoic shales;Beers;Bull. Amer. Ass. Petrol. Geol.,1945
5. Distribution of radioactivity in ancient sediments;Beers;Bull. Geol. Soc. Amer.,1944