TY  - BOOK
AU  - Schaaf,M
TI  - Reduction of the product of two irrducible unitary representations of the proper orthochronous quantum mechanical poincare' group
T2  - Lecture notes in physics 5
U1  - 13.04+22 
PY  - 1970///
CY  - Berlin
PB  - Springer
ER  -