@article{1093893938,
author = {Clay, Robert E.},
title = {Affine geometry with S. Dowdy's ``trapezoid'' as primitive.},
journal = {Notre Dame J. Formal Logic},
volume = {11},
number = {1},
year = {1970},
pages = { 205-219},
language = {en},
url = {http://dml.mathdoc.fr/item/1093893938}
}
Clay, Robert E. Affine geometry with S. Dowdy's ``trapezoid'' as primitive.. Notre Dame J. Formal Logic, Tome 11 (1970) no. 1, pp. 205-219. http://gdmltest.u-ga.fr/item/1093893938/