Include the 776 field in ISBN matching when deduping books
Deduping of books would be improved if the deduping algorithm included the 776 field in ISBN matching. Currently, the algorithm only checks the 020 field for ISBN. In many cases, an electronic version of a book has the print ISBN in the 776 field, which would allow for a match of the electronic 776 to the print 020. The February VE release included an improvement that allowed the 776 field to be used when matching journal ISSNs, but it is still not being used when matching book ISBNs.