Doiron & Beers 2009, pp. 1–4 Doiron, Ted; Beers, John (2009), The Gauge Block Handbook(PDF), USA: Dimensional Metrology Group, US National Institute of Standards and Technology
Doiron & Beers 2009, p. 12 Doiron, Ted; Beers, John (2009), The Gauge Block Handbook(PDF), USA: Dimensional Metrology Group, US National Institute of Standards and Technology
Doiron & Beers 2009, p. 4 Doiron, Ted; Beers, John (2009), The Gauge Block Handbook(PDF), USA: Dimensional Metrology Group, US National Institute of Standards and Technology
Doiron & Beers 2009, pp. 138-139 Doiron, Ted; Beers, John (2009), The Gauge Block Handbook(PDF), USA: Dimensional Metrology Group, US National Institute of Standards and Technology