Bonsall F <br/><br/>
Numerical ranges of operators on normed spaces and of elements of normed algebras 

 -  1971 
 - p.  cm. 
<br/><br/><label>Standard No.: </label>23797 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>B43N63, L1