“…Papers which cannot conveniently be classified by method of determination, include a review of many aspects of the inorganic chemistry of zirconium by Clearfield (100), a separation of zirconium and hafnium by solvent extraction of their thiocyanates by Fischer, Pohlmann, and Adam (Ho), a review of methods of solvent extraction by Green (175), studies of separations by reversed-' phase partition chromatography by O'Laughlin and Banks (877) and Cerrai and Ghersini (85). Ion exchange separation studies including zirconium were published by Strelow, Rethemeyer, and Bothma (521), Kallmann (229), Hamaguchi et al (187), Holloway and Nelson (200) and Danielsson (106).…”