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Gen. John D. Ryan, Chief of Staff, U.S. Air Force hearings before the United States Senate Committee on Armed Services, Ninety-First Congress, first session, on July 24, 1969
- "Gen. John D. Ryan, Chief of Staff, U.S. Air Force hearings before the United States Senate Committee on Armed Services, Ninety-First Congress, first session, on July 24, 1969"@en
- "Gen. John D. Ryan, Chief of Staff, U.S. Air Force : hearings before the United States Senate Committee on Armed Services, Ninety-First Congress, first session, on July 24, 1969"@en