Marcie Jones had been in Marcie & The Cookies in the 60s: see their 1968 releases All Or Nothing and I Would If I Could.
Further reading: Marcie & The Cookies at
Wikipedia.
Suggestion from Terry Stacey.
Single on Philly Groove label February 1973 by Philly soul trio formed in Philadelphia in 1971.
Writers Felder and Harris were regular collaborators in the Philadelphia Soul scene of the 1970s.
Further reading: 1. Ed Hogan’s biographies of Allan Felder
and First Choice All Music. 2.
Philadelphia (Philly) Soul entry at Wikipedia.
Thanks to Mike Robbins for clarification.