Ballmann, Werner <br/><br/>
Manifolds of nonpositive curvature 
Werner Ballmann, Mikhael Gromov, Viktor Schroeder 
 - Boston  Birkhèauser  1985 
 - iv, 263 p  ill  23 cm 
 - Progress in mathematics  v. 61 .
 - Progress in mathematics (Boston, Mass.) .
<br/><br/> Based on four lectures delivered by M. Gromov in Feb. 1981 at Collège de France, Paris, with appendices by W. Ballmann and V. Schroeder  Contine bibliogr. si index 
<br/><br/><label>ISBN: </label>081763181X 
<br/><br/><label>LCCN: </label>85020149 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geometry, Differential<br/>Manifolds (Mathematics)
<br/><br/><label>Dewey Class. No.: </label>516.3/6