Armstrong, L.  1940- <br/><br/>
Theory of the hyperfine structure of free atoms / 
Lloyd Armstrong, Jr. 
 - New York :  Wiley-Interscience,  1971 
 - ix, 209 p. :  ill. ;  23 cm. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>0471033359 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Hyperfine structure