TY  - BOOK
AU  - Nayfeh, Ali Hasan
TI  - Perturbation Methods 
SN  - 0471630594
U1  - 515.35 
PY  - 1973///
CY  - New York : 
PB  - John Wiley, 
KW  - Asymptotic Expansions
KW  - Differential Equations Numerical Solutions
KW  - Perluration Mathematics
N1  - NY
UR  - https://eaklibrary.neduet.edu.pk:8443/catalog/bk/books/toc/0-471-63059-4.pdf
ER  -