Cite
MLA Citation
British Standards Institution,. Method of measurement of centre beam intensity and beam angle(s) of reflector lamps.. London : British Standards Institution, 2011. http://access.bl.uk/ark:/81055/vdc_100171332225.0x000001
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British Standards Institution,. Method of measurement of centre beam intensity and beam angle(s) of reflector lamps.. London : British Standards Institution, 2011. http://access.bl.uk/ark:/81055/vdc_100171332225.0x000001