Carmichael, R. D.  1879-1967 <br/><br/>
The Theory of Numbers  [electronic resource] / 
R. D. Carmichael 
 -  Project Gutenberg,  2004 
 - Project Gutenberg  13693 .
<br/><br/> Public domain in the USA. 
<br/><br/>Electronic text 
<br/><br/><label>Subjects--Index Terms: </label>Number theory 
<br/><br/><label>LC Class. No.: </label>QA