Handbook on the Physics and Chemistry of Rare Earths 
Subtitle: Volume 21 (Handbook on the Physics and Chemistry of Rare Earths)
Publisher: North Holland
Published: October 1, 1995
Language: eng
Number of pages: 419
ISBN-13: 9780444821782
First sentence: The separation chemistry and technology of rare earths have developed to a sufficiently high degree of sophistication that very high purity products can generally be produced when required.