Kelly, Paul Joseph. <br/><br/>
The non-Euclidean, hyperbolic plane  its structure and consistency / 
Paul Kelly, Gordon Matthews. 
 - New York :  Springer-Verlag,  1981. 
 - 1 v. (various pagings) :  ill. ;  24 cm. 
 - Universitext .
<br/><br/> Includes index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geometry, Hyperbolic.