Cite
APA Citation
Institution,, B. S. (2023). Tracked Changes. Optics and optical instruments. Test lenses for calibration of focimeters.. London : British Standards Institution. http://access.bl.uk/ark:/81055/vdc_100188285158.0x000001
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Institution,, B. S. (2023). Tracked Changes. Optics and optical instruments. Test lenses for calibration of focimeters.. London : British Standards Institution. http://access.bl.uk/ark:/81055/vdc_100188285158.0x000001