TY  - BOOK
AU  - Bellman, Richard Ernest,
TI  - Perturbation Techniques in mathematics, engineering and physics
SN  - 9780486432588
U1  - 515.35 BEL 
PY  - 1966///
CY  - New york
PB  - Dover Publication
N1  - Originally published: New York : Holt, Rinehart and Winston, c1964 in series: Athena series; selected topics in mathematics.
UR  - http:/​/​www.loc.gov/​catdir/​description/​dover031/​2003046260.html
UR  - http:/​/​www.loc.gov/​catdir/​toc/​dover031/​2003046260.html
ER  -