[GNC] How to install Gnucash 3.8 on Debian 10 "buster"?

[km22]

Hi,

I recently moved from Windows 7 (due to end of life) to Debian 10.  I
have gnucash 3.4 installed from the standard repo.  However I think this
version contains a bug as I cannot see any of the historical FX prices I
stored in the Price Database. I think I need to move to a more recent
version.  I saw this wiki article: https://wiki.gnucash.org/wiki/Debian
but no clues there on how to install the latest version 3.8.  Can anyone
here advise?

Thanks,
Ken