| Tölke, J. | Contributions to Geometry: Proceedings of the Geometry Symposium in Sigen 1978 | 51 Geometry |
| Albert, A. | An Introduction to thr Finite Projective Planes | 51 Geometry |
| Albert, A. Adrian | An Introduction to finite projective planes | 51 Geometry |
| Beman, Wooster W. | Klein Famous Problems of Elementary Geometry | 51 Geometry |
| Blaschke, Wilhelm | Einfürhung in die Geometrie dear Waben | 51 Geometry |
| Brannan, David | Geometry | 51 Geometry |
| Campbell, Alan D. | Advanced Analytic Geometry | 51 Geometry |
| Carver, Walter | The Conjuat Coordinate System for Plane Euclidean Geomtry | 51 Geometry |
| Coexter, H.S.M. | Lectures in Projective Geometry | 51 Geometry |
| Coexter, H.S.M. | The Real Projective Plane | 51 Geometry |
| Cohn, Hilbert | Geometry and the Imagination | 51 Geometry |
| Coolidge, Julian L. | A History of Conic Sections and Quadric Surfaces | 51 Geometry |
| Coxeter, H.S.M. | The Beauty of Geometry | 51 Geometry |
| Coxeter, H.S.M. | The Beauty of Geometry: Twelve Essays | 51 Geometry |
| Dickson, Leonard | Plane Trigonometry with Practical Applications | 51 Geometry |
| Dickson, Leonard | Planes Trigonometry with Applications | 51 Geometry |
| Ernst, Louis | Einfürhung in die Freire Geometrie ebener Kurven | 51 Geometry |
| Fenchel, Werner | Elementary Geometry in Hyperbolic Space | 51 Geometry |
| Gans, David | Transformation and Geomtries | 51 Geometry |
| Golos, Ellery | Foundations of Euclidean and Non-Euclidean Geometry | 51 Geometry |
| Gore, James | Plane and Solid Geometry | 51 Geometry |
| Gore, James | Plane and Solid Geometry | 51 Geometry |
| Graustein, William | Introduction to Higher Geometry | 51 Geometry |
| Graustein, William C. | Introduction to higher order geometry | 51 Geometry |
| Grünbaum, Branko | Convex Polytopes | 51 Geometry |
| Hadwiger, Hugo | Combinatorial Geometry in the plane | 51 Geometry |
| Hartshorne, Robin | Companion to Euclid | 51 Geometry |
| Heath, Thomas | Euclid: The Thirteen books or The Elements | 51 Geometry |
| Henderson, David | Experiencing Geometry on Plane and Sphere | 51 Geometry |
| Henderson, David | Experiencing Geometry on Plane and Sphere | 51 Geometry |
| Hilbert, David | Foundations of Geometry | 51 Geometry |
| Holgate, T. F. | Projective Pure Geometry | 51 Geometry |
| Jones, George | A Treatise on Trigonometry | 51 Geometry |
| Jones, George | A Treatise on Trigonometry | 51 Geometry |
| Klein, Felix | Über Das Ikosaeder | 51 Geometry |
| Klein, Felix | Kleins Famous Problems of Elementary Geometry | 51 Geometry |
| Lancoz, Cornelius | Spaces Through the Ages | 51 Geometry |
| Lane, Ernest | Projective Differential Geometry of Curves And Surfaces | 51 Geometry |
| Lang, Serge | Geometry: A High School Course | 51 Geometry |
| Levy, Silvio | Flavors of Geometry | 51 Geometry |
| Levy, Silvio | Flavors of Geometry | 51 Geometry |
| Maor, Eli | Beautiful Geometry | 51 Geometry |
| Maor, Eli | Beautiful Geometry | 51 Geometry |
| Moise, Edwin E. | Elementary Geometry From An Advanced Standpoint | 51 Geometry |
| Porteous, Ian | Topological Geometry | 51 Geometry |
| Sah, C-H | Hilbert's Third Problem: Scissors Congruence | 51 Geometry |
| Salmon, George | A Treatise on the Higher Plane Curves | 51 Geometry |
| Seidenberg, A. | Lectures in Projective Geometry | 51 Geometry |
| Slaught, Herbert | Contributions to Geometry | 51 Geometry |
| Smart, James | Modern Geometrics | 51 Geometry |
| Smith, C | Conic Section | 51 Geometry |
| Smith, Charles | Conic sections | 51 Geometry |
| Smith, C. | Cohn Section | 51 Geometry |
| Snapper, Ernst | Metric Affine Geometry | 51 Geometry |
| Soifer, Alexander | How Does One Cut a Triangle? | 51 Geometry |
| Soifer, Alexander | How does one cut a triangle | 51 Geometry |
| Sommerville, D.M.Y | The Elements of Non-Euclidean Geometry | 51 Geometry |
| Sommerville, D.M.Y. | Non-Euclidean Geometry | 51 Geometry |
| Sommerville, D.m.y. | The Elemente of Non-Euclidean Geometry | 51 Geometry |
| Springer , C.E. | Geometry and Analysis of Projective Spaces | 51 Geometry |
| Todd, J.A. | Projective and Analytical Geometry | 51 Geometry |
| Tolke, J. | Contributions to Geometry | 51 Geometry |
| Watson, Emery E. | Elements of Projective Geometry | 51 Geometry |
| Wenninger, Magnus | Spherical Models | 51 Geometry |
| Wenninger, Magnus | Spherical Models | 51 Geometry |
| Wentworth, G.A. | A Textbook of Geometry | 51 Geometry |
| Wentworth, G | Textbook Geometry | 51 Geometry |
| Yale, Paul | Geometry and Symmetry | 51 Geometry |
| Yale, Paul | Geometry and Symmetry | 51 Geometry |
| Young, John | Projective Geometry | 51 Geometry |
| Young, John | Projective Geometry | 51 Geometry |
| nan, nan | Notes on Convex Geometry | 51 Geometry |
| nan, nan | Hilberts thied problem : Scissors Congruence | 51 Geometry |