1. Canadian Standards Association. Special paper on the international system of units. June (1973).
2. The U.S. Department of Commerce, National Bureau of Standards. Special publication, 420.
3. The 1975 World Encyclopedia Supplement. Field Enterprises Educational Corporation. Chicago.
4. Black, G.J. Canada goes metric. Doubleday. Toronto (1974).
5. Metric conversion kit for hospitals. Canadian Hospital Association (1975).