Legendary Chicago soul producer Clarence Johnson died yesterday. He was responsible for a ton of records that helped define the Chicago Sound, especially in the early 70s. The biggest hit he ever had was Love Jones by the Brighter Side of Darkness but he produced a ton of great records by artists such as the Lovelites, Heaven and Earth, Coffee, Denice Chandler, the Ledgends, etc.
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further reading links
google books - Chicago Soul By Robert Pruter
a Jan 2000 article