TY  - BOOK
AU  - Migdal, A.B.
AU  - Krainov, V.
AU  - Leggett,Anthony J.,tr.
TI  - Approximate methods in quantum mechanics
T2  - Frontiers in physics
U1  - 530.12 
PY  - 1969///
CY  - New york
PB  - W.A.Benjamin,Inc.
ER  -