151.
The Elements of Euclid for the Use of Schools and Colleges, Books I, Ii, Iii ... Authorized ...
by Todhunter, I. 1820-1884
ISBN: 9781021932143
152.
A Treatise On Plane Co-ordinate Geometry as Applied to the Straight Line and the Conic Secti...
by Todhunter, I. (isaac) 1820-...
ISBN: 9781013480959