Geometric Dimensioning and Tolerancing
This is a link to notes on Geometric Design and Tolerancing by Prof. Graeme Britton of Raffles Design Institute, Singapore:
http://www.docin.com/p-6099896.html
Prof. Britton's Notes on GD&T
A pdf version of Prof. Britton’s lecture is available at:
http://synthetica.eng.uci.edu/~mccarthy/mechanicaldesign101/GDandT.pdf