The following document was released heavily redacted, and parts fully withheld, in June 2005. The Black Vault filed a Mandatory Declassification Review (MDR) request on April 23, 2020, and the record was released January 4, 2020.
The result was an MDR success, wherein the CIA released numerous pages, and lifted numerous redactions, on the record.
The document can be seen below.
Background on Six Subjects Suggested by Acting DDI, 7 August 1967 [89 Pages, 4.8MB]