[United States National Bureau of Standards Ruler]
Description:
Ruler issued by the United States National Bureau of Standards. The front includes measurements in centimeters (to 15) and inches (to 6); there is text on the back comparing metric and customary units for length, volume, and weight.
Date:
December 1972
Creator:
United States. National Bureau of Standards.
Item Type:
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Physical Object
Partner:
UNT Libraries Government Documents Department