The new metal worker pattern book; a complete course of instruction in the modern methods of developing and cutting the patterns for sheet metal work, giving the principles underlying practically every problem that is likely to come up in practice and explaining the selection and use of drawing tools and linear and geometrical drawing so clearly that one, who has had no previous knowledge of arithmetic or drawing, may understand these essentials and apply them in using the 253 problems in the development of patterns by the parallel line, conical or flaring, and triangulation systems.

Mode of access: Internet.

Triangulation du Roayume de Belgique : exécutée par MM. les officiers de la section géodésique du dépot de la guerre.

Libros II: Mesure des bases; Libro III: Observations astronomiques.

Curso elemental de mecánica teórica y aplicada: escrito en francés por M. Ch. Delaunay /

Mode of access: Internet.

Account of the observations and calculations, of the principal triangulation;

Mode of access: Internet.

Cantilever extension of ground control in strips of convergent photographs by analytical triangulation.

"Contract no. DA-44-009 Eng-2986, Department of the Army Project no. 8-35-11-106."

Mémoires de Mme. de Staal Delaunay, de M. le Marquis d'Argenson et de Madame Mère du Régent. Suivis d'éclaircissements extraits des mémoires du Duc de Saint-Simon, avec avant-propos et notices,

Mode of access: Internet.