Hi Paul,
You need to add 952$e to Zebra config.
You can start from here:
https://wiki.koha-community.org/wiki/How_to_add_new_zebra_index
https://wiki.koha-community.org/wiki/Understanding_Zebra_indexing
Inside Zebra there are still data from 952, check how it works.

Bye
Zeno Tajoli

On Mon, Mar 22, 2021 at 11:38 PM Paul A <paul.a@navalmarinearchive.com> wrote:
Is it possible in OPAC to search by acqsource 952$e? (no problem in
MySQL, admin, reports) -- this email for OPAC query.

Background: charitable library, trying to define donor fonds publicly.

Disclaimer: using Koha 3.8.24 for ten years or more. I know (some of you
might remember me) that we "should upgrade." We are not a lending, nor
public library, use Koha very successfully at
<https://opac.navalmarinearchive.com/> for cataloguing only, and cannot
get later versions to work anywhere near as fast for OPAC / zebra
searches.  New summer students, IT specialty, coming in this year will
try again...

Best regards, and please stay safe,
Paul
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