Economy and safety in post-war roads.

Mode of access: Internet.

Travel and roads in England.

Mode of access: Internet.

Mathematical instruction in France.

Appendices C and D "for later publication."

Models to illustrate the foundations of mathematics /

Mode of access: Internet.

Mathematical instruments, their construction, adjustment, testing, and use, comprising drawing, measuring, optical, surveying, and astronomical instruments.

Mode of access: Internet.