- London: Routledge 
 - 3785 
<br/><br/> BK  Pure mathematics - definition|Symbolic logic 
<br/><br/><label>ISBN: </label>510/RUS/P 
<br/><br/><label>Standard No.: </label>Russell, Bertrand 
<br/><br/><label>Subjects--Topical Terms: </label><br/>BK
<br/><br/><label>Dewey Class. No.: </label> /