TY - BOOK AU - Bellman, Richard TI - Peturbation techniques in mathematics, engineering & physics SN - 9780486432588 SN - 200304626 U1 - 515.35 BEL PY - 2003/// CY - Mineola, NY PB - Dover Publications KW - Perturbation (Mathematics) N1 - Originally published: New York : Holt, Rinehart and Winston, c1964 in series: Athena series; selected topics in mathematics. Includes indexes ER -