Lawden, Derek F. <br/><br/>
Mathematics of engineering systems :  (linear and non-linear) / 
by Derek F. Lawden 
 - London :  Methuen,  1954 
 - 380 p. :  ill. ;  23 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential equations<br/>Fourier series