George J. Laurer (Simple English Wikipedia)

Analysis of information sources in references of the Wikipedia article "George J. Laurer" in Simple English language version.

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88^th place

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abc11.com

"UPC inventor, George Laurer, dies at 94 in his North Carolina home". WTVD. December 9, 2019.

about.com

inventors.about.com

Bar Codes - The History of Bar Code^{[permanent dead link]} About.com