Boruvka O <br/><br/>
Foundation of the theory of groupoids and groups. 
Boruvka O 
 -  1976 
<br/><br/><label>Standard No.: </label>125805 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>B27, L6