Cohn, Paul Moritz <br/><br/>
Linear equations / 
By P. M. Cohn 
 - London :  English Language Book Society,  1971 
 - 75 p. :  ill. ;  19 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Equations, Simultaneous<br/>Vector analysis<br/>Matrices