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The Words and Writings of John L. Piotrowski, General, United States Air Force; Commander in Chief, North American Aerospace Defense Command; Commander in Chief, United States Space Command: 6 February 1988
John L. Piotrowski
出版Department of Air Force, 1989
URLhttp://books.google.com.hk/books?id=9ozfOSCWiBIC&hl=&source=gbs_api
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