1. Geochemical prospecting of a uraniferous bog deposit at Masugnysbyn, northern Sweden;Armands,1961
2. Review of uranium ocurrences in permian sediments of Europe, with special reference to uranium mineralization in Permian sandstone;Barthel,1974
3. Uranium in precipitates and evaporates;Bell;U.S. Geol. Surv., Prof. Pap.,1955
4. Deposition of uranium in salt-pan basins;Bell;U.S. Geol. Surv., Prof. Pap.,1960