What Size Should A Printed QR Code Be?(qrstuff.com)
qrstuff.com
What Size Should A Printed QR Code Be?
http://www.qrstuff.com/blog/2011/01/18/what-size-should-a-qr-code-be
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http://www.qrstuff.com/blog/2011/01/18/what-size-should-a-qr-code-be
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