Fenchel, W.  1905- <br/><br/>
Elementary geometry in hyperbolic space/ 
Werner Fenchel. 
 - Berlin ;  New York:  W. de Gruyter,  1989. 
 - xi, 225 p.:  ill.;  25 cm. 
 - De Gruyter studies in mathematics;  11. .
<br/><br/> Includes index. 
<br/><br/>Bibliography: p. [221]-222. 
<br/><br/><label>ISBN: </label>0899254934 (U.S.) :  $65.00 
<br/><br/><label>LCCN: </label>89007650 //r90 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geometry, Hyperbolic.
<br/><br/><label>Dewey Class. No.: </label>516.9  / F331e