When was the definition of the torr changed? 

The article currently says that originally, 1Torr = 1mmHg, but this was changed in 1954 to be 1Torr = 1/760atm. 
However, the reference given to prove this says no such thing! That reference is about a redefinition of the atmosphere (to 101325atm = 1Pa). It doesn't say anything about the torr.
Any takers...?