Preceding Page (2.4. Quadrangle and quadrilateral)      Parent Page (Chapter 2. Incidence)

H.S.M. Coxeter.
The Real Projective Plane.

Springer Science & Business Media, 1992.

Chapter 2. Incidence.

2.5. Harmonic Conjugacy. Pp. 18 — 19.

See this text in Russian there.

Preceding Page (2.4. Quadrangle and quadrilateral)      Parent Page (Chapter 2. Incidence)