Making Old ISBNs New Again

If you bought a batch of ISBNs some years ago, and didn't allocate all of them, you may have noticed they are somewhat shorter than the current 13 digit ISBN formulation. Fortunately, new life can be breathed into your old truncated numbers. They can then go on to parent handsome barcodes to assist in the tracking of your magnum opus across the web and bookstores worldwide...