Bonola, Roberto . <br/><br/>
Non Euclidean Geometry /  Textual Documents 
Roberto Bonola, H.S.Carslaw & F.Enriques. 
 - 1st ed. / 
 - Chicago :  The Open Court Publishing Co. ,  1912. 
 - iv,264p. ;  19cm. 
<br/><br/>Index 
<br/><br/><label>Subjects--Index Terms: </label>Geometry-Non Euclidean G-Mathematics 
<br/><br/><label>Dewey Class. No.: </label>513.8  / B 64 N