Certainly there must be more world wide magazine articles in 1975 about the Norton Mk3!
This list of 5 is from Old Britts.
Norton 850 John Player Special: Cycle Test, Cycle - Dec 1975
Norton Commando Mk 3: 10,000 km Test, Motorcycling Monthly - Nov 1975
The Cleancut Commando, Two Wheels - Oct 1975
Norton 850 Commando: Road Test, Cycle World - Dec 1975
Norton Commando Mk 3 Motorcycling Monthly - Dec 1975
Two Wheels magazine is apparently Australia.
Cycle, Cycle World is USA.
Motorcycling Monthly what country?