Carslaw, H.S. <br/><br/>
Elements of non-euclidean plane geometry and trignometry with diagrams 

 - London  Lougmaus Green&Co  1916 
<br/><br/><label>Subjects--Uniform Titles: </label><br/>plane<br/>Geometry
<br/><br/><label>Dewey Class. No.: </label>513.8  / C22N