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Johnson, Nick (18 August 2005). "Interleaved 2 of 5". Everything you Never Wanted to Know About Barcodes. Archived from the original on July 16, 2007. Retrieved August 21, 2007.
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Johnson, Nick (18 August 2005). "Interleaved 2 of 5". Everything you Never Wanted to Know About Barcodes. Archived from the original on July 16, 2007. Retrieved August 21, 2007.