William, Have you considered http://gewhere.github.io/org-bibtex ??
Or using the approach therein, viz. use properties to store bib data in org? HTH, Chuck > On May 28, 2023, at 7:46 AM, William Denton <w...@pobox.com> wrote: > > I'm thinking about moving a personal library catalogue system into Org. This > would involve ISBNs, and when ISBNs had 10 digits some would have leading > zeros. It turns out leading zeros are removed when something looks like a > number. > [snip]