Weighing throughout the ages.

Geahča maid

• Specifications and tolerances for weights and measures and weighing and measuring devices, as adopted by the eleventh annual Conference on the Weights and Measures of the United States, held at the Bureau of Standards, Washington, D.C. May 23-26, 1916.
  Almmustuhtton: (1920)
• The world of measurements : masterpieces, mysteries and muddles of metrology.
  Dahkki: Klein, H. Arthur
  Almmustuhtton: (1975)
• World in the balance : the historic quest for an absolute system of measurement /
  Dahkki: Crease, Robert P.
  Almmustuhtton: (2011)
• Anciens systemes de poids et mesures en Occident /
  Almmustuhtton: (1992)
• Metrologicorum scriptorum reliquiae /
  Dahkki: Hultsch, Friedrich Otto, 1833-1906
  Almmustuhtton: (1864)