IEC publication 27-1 : Letter symbols to be used in electrical technology : part 1 : general
- Geneva INTERNATIONAL ELECTROTECHNICAL COMMISSION
- 79p.
STD3085
IEC publication 27-1 : part 1
621,3-777.1:003.62
STD3085
IEC publication 27-1 : part 1
621,3-777.1:003.62