Just for reference, Bernie Asbel's recording of "Song of My Hands" was issued on Bell LL-101-A. The flip side was a duet by Bernie Asbel and Pete Seeger on Baldwin Hawes's song "Mad as I Can Be". I don't have a date for the recording, but I'm sure there's one in the Bear Family set's annotations. Note that this is the postwar Bell label, no relation to the 1920s one; this Bell label also issued a lot of klezmer recordings.

Peace,
Paul