TY  - BOOK
AU  - Velo Giorgio Ed.
AU  -  Wightman Arthur S Ed.
ED  - International school of mathematical physics on on invariant wave equations (1977 : Erice)
TI  - Proceeding of mathematical physics on invariant invariant wave equations
T2  - Lecture notes in physics; 73
U1  - CN2p1,N77, L8 
PY  - 1978///
CY  - Berlin
PB  - Springer-Verlag         
KW  -  Wave equations
KW  - Physics
ER  -