Lawden, Derek F. <br/><br/>
Mathematics of engineering systems :  [linear and non-linear]. 

 - [2nd ed.]. 
 - London :  Methuen,  [1961] 
 - University paperbacks .
<br/><br/> First published in this ed. in 1959. 
<br/><br/>Includes bibliographies. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential equations.<br/>Fourier series.