[78-L] Harry Reser discog?

[Malcolm Rockwell]

I just found a Harry Reser side ("Ooh! Maybe It's You" by Irving Berlin 
on Co 1109-D) with a nice chorus of steel guitar work. Judging by the 
sound, issue date and location my best guess would be the sg player is 
Andy Sannella. As is common for Sannella, he is not credited.
In fact most discographies, including both Rust's Jazz Records and ADB, 
don't list Reser's massive output or only give him a passing mention. 
There are virtually no personnel lists, either.
Jazz and Ragtime Records gives a blanket personnel (but no mention of 
Sannella) and mentions that one William W. Triggs has tackled a full-on 
Reser discography. I found a site on Google with Reser banjo 
transcriptions by Bill Triggs, but that's about it and no mention of a 
discography.
How might I access his work?
Malcolm