Affine maps, euclidean motions and quadrics per Reventós i Tarrida, Agustí

Available for UP System via Springer Link.

The fifth postulate how unraveling a two-thousand-year-old mystery unraveled the universe per Bardi, Jason Socrates

Painless math geometry per Benes, Salita C.

Foundations of plane geometry. per Blau, Harvey I.

Barron's geometry the easy way per Leff, Lawrence S.

Euclidean and non-Euclidean geometry an analytic approach per Ryan, Patrick J.

A new approach to plane geometry per Van Denover, Alice

Congruence in algebra and geometry a study on their meanings per Blankas, Angelita Buted 1949-

Geometry in a modern setting. per Choquet, Gustave

Plane coordinate geometry per School Mathematics Study Group