أëàâيàے ًٌٍàيèِà ٌàéٍà
Hodgson, Fred. T. (Frederick Thomas), 1836-1919; Williams, Morris
Stair-building and The steel square; a manual of practical instruction in the art of stair-building and hand-railing, and the manifold uses of the steel square
Chicago : American Technical Society, 1917
تيèمà âçےٍà ٌ ٌàéٍà http://www.archive.org