Conversation so far:
What did Barry White do as a producer?
White got his big break producing a girl group he had discovered called Love Unlimited.
Was this group "Love Unlimited" successful?
Love Unlimited, became a million album seller and the first of White's string of long-titled albums and singles.
Did Barry White produce any other albums?
The album, 1972's From A Girl's Point of View We Give to You...
What about toher albums after that one?
CANNOTANSWER.
Is there anything else interesting?
White produced, wrote and arranged their classic soul ballad "Walkin' in the Rain with the One I Love", which climbed to #14 in the Billboard Hot 100.
Was this his most successful work of the 70's?
I Belong to You", which spent over five months on the Billboard R&B chart in 1974 including a week at #1.
What other albums produced by Barry White are also famous?
CANNOTANSWER.
Who else or what other groups did Barry White work with?
Russ Regan, who was the head of the Uni label owned by MCA.

Question: In what year did he work with Russ Regan?
Self-contained rewrite: In what year did Barry White work with Russ Regan?