Is: 1885 (Part Xxxi) - 1971; Electrotechnical Vocabulary Part 31 Magnetism
Indian Standards Institution
Is: 1885 (Part Xxxi) - 1971; Electrotechnical Vocabulary Part 31 Magnetism - BIS 1972
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Is: 1885 (Part Xxxi) - 1971; Electrotechnical Vocabulary Part 31 Magnetism - BIS 1972
/