United States. National Bureau of Standards. Museum. Catalog of artifacts on display in the NBS Museum / H. L. Mason, editor.

United States. National Bureau of Standards. Museum.

Catalog of artifacts on display in the NBS Museum / H. L. Mason, editor.

United States. National Bureau of Standards. Museums.

Scientific apparatus and instruments -- Standards -- United States -- Exhibitions.

Weights and measures -- United States -- Exhibitions.

Mason, H. L. (Henry Lea), 1900-