References
Integrated Publishing: Mechanical Lettering.
Accessed 10 December, 2012
www.tpub.com/engbas/3-35.htm.
Vintage Drafting Equipment. Accessed 10
December, 2012 www.patrickkerr.com/
DRAFTINGEQUIP.html.
Vintage Drafting Equipment photo. Accessed
10 December, 2012 http://patrickkerr.
com/DRAFTINGEQUIP.html