Ian Whitcomb did a version of the song in the 60's on an album entitled "Yellow Underground" (Capitol Records). Pretty much the original lyric, though he credited "F. Arthur Nouveau" also (one of his "nom de plumes".
I would guess this to be the source for the MP3 file.
This has been an "earworm" for me ever since.
There is a youtube video of a professor at UC Davis, apparently performing it:
http://www.youtube.com/watch?v=--pk2Lsj0hE