TY  - BOOK
AU  - Bleuler, K., ed.
AU  - Reetz, A., ed.
TI  - Differential geometrical methods in mathematical physics - symposium held at the university of Bonn
T2  - Lecture notes in mathematics
U1  - 516.36 
PY  - 1977///
CY  - Berlin
PB  - Springer-Verlag
ER  -