Benny, L.B. <br/><br/>
Plane geometry;an account of the more elementry properties of the conic sections,treated by the methods of co-ordinate geometry,& of modern projectives geometry,with applications to practical drawing 

 - London  Blackie and son  1922 
<br/><br/><label>Subjects--Uniform Titles: </label><br/>Plane<br/>Geometry
<br/><br/><label>Dewey Class. No.: </label>516  / B46P