TY  - BOOK
AU  - Yourgrau,Wolfgang
AU  - Mandelstam,Stanley
TI  - Variational principles in dynamics quantum theory
SN  - 9780486458885
U1  - 530.15 Y87V 
PY  - 2007///
CY  - New Delhi
PB  - Dover Publications
KW  - Hamilton's principle
KW  - Wave mechanics
ER  -