Askwith, E.H.. <br/><br/>
Course of Pure Geometry /  

 - 1st ed /  
 - Patna-4 :   Scientific Book Company. 
 - p.284,xi :  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics 
<br/><br/><label>Dewey Class. No.: </label>B6:6  / J6;2