TY  - BOOK
AU  - Simmonds, James G
AU  - Mann, James E
TI  - A first look at perturbation theory
SN  - 9780486675510
U1  - 515.35 SIM 
PY  - 1998///
CY  - Mineola, N.Y
PB  - Dover Publications
KW  - Approximation theory
ER  -