Michael D. Campbell, P.G., P.H., I2M’s Chief Geologist/Hydrogeologist has just published a review titled: “Uranium, Thorium, and Associated REEs of Industrial Interest,” in Unconventional Energy Resources: 2013 Review of the Uranium Commodity Committee Activities of the Energy Minerals Division, American Assoc. Petroleum Geologists, in PDF format (see PDF pages 44-61) prior to the release of the paper in the Journal of Natural Resources Research, Vol. 23, No. 1, January Issue, Springer Publishing for the paginated journal article (more).