Who Were The Background Singers/group On Tina Britt's "the Real Thing"?

[Robbk]

I can tell that the background singers or group on that song are different from those Juggy Murry used on "You're Absolutely Right".  Murry used a lot of different background singers on his various Sue, Symbol, Crackerjack, Eastern, Broadway, Juggy and other productions in the '60s.  So, it would be very difficult to "guess" who they were.

 

Anyway have actual information on who they were?  Does any source exist documenting Murry's recording sessions (studio used, producers, arrangers, background singers, etc.)?