Gupta, C. K. Extractive metallurgy of rare earths / by C. K. Gupta. - Boca Raton : CRC Press, 2005. - xvii,484p. ; 24 cm. Include Index ISBN: 9780415333405 Subjects--Topical Terms: Rare earth metals -- Metallurgy. Dewey Class. No.: 669.291 / GUP/E