TY  - GEN
AU  - Nayfeh, Ali Hasan
TI  - Perturbation methods 
SN  - 9780471399179 
U1  - 515.35 
PY  - 2000///
CY  - New York : 
PB  - Wiley-Interscience publication, 
KW  - Linear equations
KW  - Multipal scales
KW  - Nonuniformity
N1  - It includes bibliographical reference and index
ER  -