Lawden, Derek F. <br/><br/>
Mathematics of engineering systems :  (linear and non-linear) / 
by Derek F. Lawden. 
 - 2nd ed. 
 - London :  New York :  Methuen ;  Wiley ,  1959. 
 - 404 p. :  ill. ;  23 cm. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential equations.<br/>Fourier series.
<br/><br/><label>Dewey Class. No.: </label>517.38