TY  - BOOK
AU  - Nayfeh, Ali Hasan
TI  - Introduction to perturbation techniques
SN  - 0-471-31013-1
U1  - 515.35 
PY  - 1993///
CY  - New York
PB  - John Wiley
KW  - Differential equations-Numerical solutions
KW  - Equations-Numerical solution
N1  - Includes index
ER  -