Opus in profectus
British-American System of Units
Units of Measurement
, Russ Rowlet, University of North Carolina at Chapel Hill
A Dictionary of Weights and Measures for the British Isles: The Middle Ages to the Twentieth Century
. Ronald Edward Zupko.American Philosophical Society. (1985).
Metrology and the State: Science, Revenue, and Commerce
. William J. Ashworth.
. Vol. 306 No. 5700 (19 November 2004): 1314–1317.
British Weights and Measures Association
, "Welcome to the world of real measurement." (Formerly at footrule.org)
, "Our way of measuring is under threat."
Canadians rebel against metric system
, CBC Digital Archives (1982)