IEC 60073:1996 Basic and safety principles for man-machine interface, marking and identification - Coding principles for indication devices and actuators
2002IEC 60073:2002 Basic and safety principles for man-machine interface, marking and identification - Coding principles for indicators and actuators
1996IEC 60073:1996 Basic and safety principles for man-machine interface, marking and identification - Coding principles for indication devices and actuators
1991IEC 60073:1991 Coding of indicating devices and actuators by colours and supplementary means