The vocal has been re- issued legally by Penniman records in a picture sleeve , here's some info about the record from IFrecords site :
Little is known about this number, save for the fact that it was waxed at Philadelphia's Virtue studio at some point in the mid-sixties. There are several opinions concerning the identity of the singer hiding behind the Marsha Gee artistic name (a celebrity?, was she drunk or simply knackered?). Another mystery: how comes that such a powerful number was not originally released? Preserved through an acetate -discovered in the late 70's- it was later included in a few compilations, some of them good, some of them quite horrendous... In any case, here you have the first legit and, hopefully, definitive release of "the duck song". Call it soul, R&B or simply dance music... In a perfect world, such a dance would be taught in schools.
Best,Eddie