TY  - BOOK
AU  - Ballmann,W
TI  - Lectures on spaces of nonpositive curvature: with an appendix by Misha Brin, ergodicity of geodesic flows
T2  - DMV seminar band 25
SN  - 9783764352424
U1  - 514.7 
PY  - 1995///
CY  - Basel
PB  - Birkhauser-Verlag
ER  -