Who produced the Four Tops "Just As Long As You Need Me", the b-side of "Shake Me Wake Me [[When It's Over)"?

The obvious answer is Holland & Dozier. After all, that's what it says on the label, that's what it says in TCMS and DFTMC, and Holland-Dozier-Holland wrote the song.

However, as H&D's production code is "H", the matrix numbers on the singles they produced for Motown begin with that letter. Uniquely, the matrix number on "Just As Long As You Need Me" begins "QQX...".

As "Q" is a miscellaneous code, usually allocated to staff who do not have a producers' contract, this does indeed raise the question of who really produced "Just As Long As You Need Me".