American Bureau of Metal Statistics Inc—–http://www.abms.com
American Welding Society—–http://www.aws.org
ASM International—– http://www.asminternational.org
Conversion Calculator—– http://www.convert-me.com/en
CRU Steel Price Indicator —- http://www.cruspi.com
Engineers Edge—–http://www.engineersedge.com/Calulators_Online.shtml
Job Shop Technology Magazine—–http://www.jobshoptechnology.com
Material Handling Industry of America—–http://www.mhia.org
Matweb Material Property Data —– http://www.matweb.com
National Center for Excellence in Metalworking Technology—–http://www.ncemt.ctc.com
National Institute of Standards and Technology—–http://www.nist.gov
Sheet Metal Definitions and Terms —- http://en.wikipedia.org/wiki/Sheet_metal