Bonola, Roberto,   1874-1911. <br/><br/>
Non-Euclidean geometry / 
Roberto Bonola. 
 - New York :  Dover Pub. Inc.,  1955. 
 - xii, 268, xxx, 71, 50 p. :  ill. ;  21 cm. 
<br/><br/><label>ISBN: </label>0486600270 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geometry, Hyperbolic.