The Foundations of Geometry

by (author) Gilbert de Beauregard Robinson

The Foundations of Geometry

by (author) Gilbert de Beauregard Robinson

n-gons

by (author) Friedrich Bachmann & Eckart Schmidt
translated by Cyril Garner

Mathematical Recreations & Essays

Twelfth Edition

by (author) W.W. Rouse Ball & H.S.M. Coxeter