TY  - BOOK
AU  - Nakajima S
AU  -  Toyozawa Y
TI  - Physics of elementary excitations
T2  - Springer series in solid state sciences; 12
U1  - CN1, M01 
PY  - 1980///
CY  - Berlin
PB  - Springer-Verlag         
KW  -  Quantum Theory
KW  - Physics
ER  -