Maxwell, E.A.. <br/><br/>
Coordinate Geometry with vectors and Tensors /  

 - 1st ed /  
 - London E.C.4 :   Oxford University Press. 
 - p.194 :  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics
<br/><br/><label>Dewey Class. No.: </label>B63:23  / J8