That's an exhaustive-looking collection! And there's still more.

A friend of mine who did the master's in Folklore program at Memorial spent a lot of time transcribing lyrics and tunes of a large number of songs which had been recorded/collected by students in that program and then shelved...we've been meaning to take a look at what she's got. The tunes are MIDI files for an Apple II so there's a bit of a technology problem.