Gupta, C. K. Extractive metallurgy of rare earths / C.K. Gupta, N. Krishnamurthy. - xvii, 484 pages : illustrations ; 25 cm ABPR records BIP ISBN: 0415333407 LCCN: 2004-0478 Subjects--Topical Terms: Rare earth metals LC Class. No.: TN693.R3 / G87 2004