I don't know why either, Wolfgang. An extensive search at jonimitchell.com (the most extensive resource I have found) makes no mention of the song. I have not been able to locate anything to make me think that it was authored by anyone other than Spanky and Our Gang. I have the old S.&O.G. album in my collection - which is not readily accessable. I will see if I can locate it in the next few days and check the credits.