Length

BS 3763: 1970. The International System of Units (SI).

11th General Conference of Weights and Measures: Proceedings, 1960, pp 51, 85.

Weights and Measures Act 1963, Chapter 31, HMSO.

BS 4311: Part 1: 1968. Specification for Metric Gauge Blocks.

ISO 3650: 1978. Gauge Blocks.

OIML International Recommendation No. 30. End Standards of Length (Gauge Blocks), 2nd edn, 1981.

Poole S. P. Dowell J. H. 1960. ‘Application of interferometry to the routine measurement of gauge blocks’, Optics in Metrology, Pergamon Press, pp 405–419.

Bennett S. J. 1971. ‘Lasers, metrology and standards’, Phys Bull, 22, 397–398.

Rowley W. R. C. Stanley V. W. 1965. ‘The laser applied to automatic scale measurement’, Machine Shop, 26, 430–432.

BS 870: 1950. External Micrometers.

Garratt J. D. 1979. ‘Survey of displacement transducers below 50 mm’, J Phys E, 12, 563–573.