[Koha] I am trying to pull the ISBN out of the UPC on the back of the book! So I will

I am trying to pull the ISBN out of the UPC on the back of the book! So I will need to also drop the first 3 chars also. Ed!

The last digit of an isbn is a check digit. Your barcode reader is probably programmed to drop it before transmission to computer. Most readers can be parametered to send or drop check-digits.

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