1. Bryan J. B. Personal communication to CE, 1996
2. Squaring the table on a disk sander;Kirkpatrick;Fine Woodworking,1996
3. Electrical Measurements;Harris,1952
4. Calibration and use of optical straightedges in the metrology of precision machines;Estler;Optical Engineering,1985
5. ISO TAG 4 “Guide to the Expression of Uncertainty in Measurement”, 1995