TY  - BOOK
AU  - Lawden,Derek F.
TI  - Mathematics of engineering systems: (linear and nonlinear) 
U1  - 517.38LAW 21
PY  - 1959///]
CY  - London, New York
PB  - Methuen, Wiley
KW  - Differential equations
KW  - Fourier series
KW  - Mathematics
ER  -