Cite
MLA Citation
British Standards Institution,. BS EN 60061. Lamp caps and holders together with gauges for the control of interchangeability and safety. Revision of 7004-21A-3 for E26, 7004-24A-2 for E39 and 7004-26-3 for E17.. London : British Standards Institution, 2021. http://access.bl.uk/ark:/81055/vdc_100123949546.0x000001