Cite
MLA Citation
British Standards Institution,. Ophthalmic optics. Bar code specifications.. London : British Standards Institution, 1999. http://access.bl.uk/ark:/81055/vdc_100105043828.0x000001
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British Standards Institution,. Ophthalmic optics. Bar code specifications.. London : British Standards Institution, 1999. http://access.bl.uk/ark:/81055/vdc_100105043828.0x000001