Sommerville, D.M.Y.. <br/><br/>
The Elements of Non Euclidean Geometry /  Textual Documents 
D.M.Y.Sommerville. 
 - 1st ed. / 
 - London :  G Bell & Sons ,  1914. 
 - viii,274p. ;  20cm. 
<br/><br/>Index 
<br/><br/><label>Subjects--Index Terms: </label>Geometry-Non Euclidean Non Euclidean-Geometry G-Mathematics 
<br/><br/><label>Dewey Class. No.: </label>513.81  / So 55 El