Barut A O Ed. <br/><br/>
Group theory in non - linear problems. 
Barut A O Ed. 
 -  1974 
<br/><br/><label>Standard No.: </label>78780 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>B27, L4