1. Fossil fuel combustion and the major sedimentary cycles;Bertine;Science,1971
2. A survey of the application of spark-source mass spectrometry to the analysis of solids;Brown,1968
3. Mercury in sedimentary rocks of the Colorado Plateau region;Cadigan;U.S. Geol. Surv., Prof. Pap.,1970
4. Abundance of Chemical Elements;Cherdyntsev,1961
5. Uranium in coal in the western United States;Denson;U.S. Geol. Surv., Bull.,1959