TY  - BOOK
AU  - Bender Carl M
AU  -  Orsezag Steven A
TI  - Advanced mathematical methods for scientists and engineers I:  Asymptotic methods and perturbation theory.     
U1  - BobD, N9 
PY  - 1999///
CY  - New York  
PB  -  Springer      
KW  - Differential Equations
ER  -