TY  - BOOK
AU  - Yourgrau Wolfgang
AU  -  Mandelstam Stanley
TI  - Variational principles in dynamics and quantum theory
U1  - CN10aB7:3, L8 
PY  - 1978///
CY  - New York    
PB  -  Dover        
KW  -  Quantum mechanics
KW  - Physics
ER  -