Cite
MLA Citation
British Standards Institution,. Standard reference zero for the calibration of pure tone air conduction audiometers.. London : British Standards Institution, 1988. http://access.bl.uk/ark:/81055/vdc_100104992641.0x000001
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British Standards Institution,. Standard reference zero for the calibration of pure tone air conduction audiometers.. London : British Standards Institution, 1988. http://access.bl.uk/ark:/81055/vdc_100104992641.0x000001