TY  - GEN
AU  - Nayfeh, Ali Hasan
TI  - Introduction to perturbation
SN  - 9788126546824
U1  - 515.35 NAY-I 
PY  - 2014///
CY  - New Delhi
PB  - Wiley-VCH
KW  - Mathematics
N1  - includes bibliography and index
ER  -