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Books about Kisevalter:
CIA Spymaster: George Kisevalter: The Agency's Top Case Officer Who Handled Penkovsky And Popov by Clarence Ashley (Aug 31, 2004)
CIA Spymaster: Kisevalter, the Agency's Top Case Officer, Who Handled Penkovsky and Popov (Hardback) - Common by By (author) Clarence Ashley (2004)
CIA Spymaster: George Kisevalter: The Agency's Top Case Officer Who Handled Penkovsky And Popov [Hardcover] [2004... (2004)
Wiki information Kisevalter:
George Kisevalter was a CIA operations officer who handled both Major Pyotr Popov, the first Soviet GRU officer run by the CIA, and Colonel Oleg Penkovsky.