51. London: Orion Publishing, 2011. . Jenkins, Dennis R. Lockheed Secret Projects: Inside the Skunk Works. St. Paul, Minnesota: MBI Publishing Company, 2001. . Landis, Tony R. and Dennis R. Jenkins. Lockheed Blackbirds. Minneapolis, Minnesota: Specialty Press, revised edition, 2005. . Pace, Steve. Lockheed SR-71 Blackbird. Swindon, UK: The Crowood Press, 2004. . Additional sources Crickmore, Paul F. Lockheed SR-71 – The Secret Missions Exposed. Oxford, England: Osprey Publishing, 2000. . Graham, Richard H. SR-71 Revealed: The Inside Story. St. Paul, MN: MBI Publishing Company, 1996. . Johnson, Clarence L. "History of the OXCART Program." Burbank, California: Lockheed Aircraft Corporation Advanced Development Projects, SP-1362, 1 July 1968. Johnson, C.L. Kelly: More Than My Share of it All. Washington, D.C.: Smithsonian Books, 1985. . Lovick, Edward Jr. Radar Man: A Personal History of Stealth. Bloomington, IN: iUniverse, 2010. . Merlin, Peter W. Design and Development of the Blackbird: Challenges and Lessons Learned., Orlando, Florida: American Institute of Aeronautics and Astronautics (AIAA), 2009. AIAA 2009–1522. Merlin, Peter W. From Archangel to Senior Crown: Design and Development of the Blackbird (Library of Flight Series). Reston, VA: American Institute of Aeronautics and Astronautics (AIAA), 2008. . Pedlow, Gregory W. and Donald E. Welzenbach. The Central Intelligence Agency and Overhead Reconnaissance: The U-2 and OXCART Programs, 1954–1974. Washington, D.C.: Central Intelligence Agency, 1992. . Rich, Ben R. and Leo Janos. Skunk Works: A Personal Memoir of My years at Lockheed. New York: Little, Brown and Company, 1994. . Shul, Brian and Sheila Kathleen O'Grady. Sled Driver: Flying the World's Fastest Jet. Marysville, CA: Gallery One, 1994. . Suhler, Paul A. From RAINBOW to GUSTO: Stealth and the Design of the Lockheed Blackbird (Library of Flight Series). Reston, Virginia: American Institute of Aeronautics and Astronautics (AIAA), 2009. . External links Project Oxcart: CIA Report FOIA documents on OXCART (Declassified 21 January 2008) Differences between the A-12 and SR-71 Blackbird Spotting maps the location of every existing Blackbird, with aerial photos from Google Maps Photographs and disposition of the "Habu" aircraft at habu.org The U-2's Intended Successor: Project Oxcart (Chapter 6 of "The CIA and Overhead Reconnaissance", by Pedlow & Welzenbach) USAF Aircraft Serial Numbers for 1960, including all A-12s, YF-12As and M-21s "The Real X-Jet", Air & Space magazine, March 1999 Secret A-12 Spy Plane Officially Unveiled at CIA's Headquarters US Secret Spy Planes Project-1963 Test Flight Crash A-012 Signals intelligence 1960s United States military reconnaissance