An early reference to a finite projective plane is in the paper by Veblen [32], which studied the axioms for geometry and used the plane of order 2 as an example. Veblen also proved that this plane of order 2 cannot be drawn using only straight lines. In a series of papers [32,33,34], Veblen, Bussey and Wedderburn established the existence of most of the planes of small orders, as well as all four non-isomorphic planes of order 9. One of the orders missing is

**[A]**Earliest Reference to Projective Planes- Note from:
*Clement Lam*Posted on: Thursday, January 25 at 02:02 PM PST

- Note from: