I think the SRSM page must be the only inaccurate citing one can find and for that I apologise, in the spirit of the new year. Robin Hall, however, would never publicly give Morris credit. He was too close to Morris and myself to make such a blatant falsification. I think he and Jimmie McGregor actually recorded the song in1959 and Norman Buchanan wrote the sleeve notes and, as been already posted, Norman gave Johnnie full credits in his wee red book published 1962 (he gave me a copy).
PS SRSM have promised to correct their page.