I am putting dates on 78rpm records in the Great 78 Project (we could
use more help!).
And I found an exciting lead in the ARSC Journal via google book search,
but alas, I only get snippet view because of copyright problems:
Would ARSC be up for making all of its journals open access and then try
to get google to allow full searching of it?
http://great78.archive.org is the project and we have 15,000 sides
without dates out of 63,000. We have a small group working through
this-- if you would like to help, please let me know.