Acknowledgements

• Donna Colletti, Daina Bouquin and all the staff at the library of the Harvard-Smithsonian Center for Astrophysics, Cambridge, Mass.
• Eileen Dorschner, former librarian at the Aeronautics/Astronautics Library, MIT, Cambridge, Mass.
• Brian Nicklas and other staff at the library and archives of the Smithsonian Air and Space Museum, Washington;
• Mark Kahn and the other staff of the Garber Facility Archives of the
• Smithsonian Air and Space Museum, Suitland, Maryland;
• The staff of Archives II, the National Archives, College Park, Maryland;
• Tomoko Steen at the Library of Congress, Washington, D.C.;
• Roger Launius at the History Office, NASA Headquarters, Washington, D.C.;
• The staff of the Declassified Documents Reading Room, National Reconnaissance Office, Virginia;
• The library at NASA Goddard Space Flight Center, Greenbelt, Maryland;
• Elaine Liston at the Archives, NASA Kennedy Space Center, Florida;
• Mark Cleary at the History Office, Patrick Air Force Base, Florida;
• The Redstone Arsenal Scientific Information Center, Huntsville, Alabama;
• The History Office, Redstone Arsenal, Huntsville, Alabama;
• The Library, NASA Marshall Space Flight Center, Huntsville, Alabama;
• The National Archives Southern Area, Atlanta, Georgia;
• The Jet Propulsion Laboratory Archives, Pasadena, California;
• The Lewis (now Glenn) Research Center archives, Cleveland, Ohio;
• The library at Kitt Peak National Observatory, Tucson, Arizona;
• Jeff Geiger at the History Office, Vandenberg Air Force Base, Lompoc, California;
• Harry Waldron at the History Office, Los Angeles Air Force Base, El Segundo, California;
• Pat McGinnis at the archives of Boeing, Los Angeles, California;
• The library at the British Interplanetary Society, Vauxhall, London;
• David Dewhirst and Jean Sanderson, formerly at the library of the Institute of Astronomy, Cambridge.
• Doug Millard and the staff of the Science Museum archives, Wroughton, England.
• The Biblioteque Nationale, Paris;
• The Centre Spatiale de Toulouse;
• L. Valentin at the library, ESTEC, Noordwijk, the Netherlands;
• Herr Schinhan at the Deutsches Museum Archiv, Munich;
• Heiner Klinkrad at ESOC, Darmstadt, Germany;
• The staff of ISRO at Bangalore and Trivandrum.
• The staff and correspondents of Novosti Kosmonavtiki magazine, Moscow;
• The Beijing University of Aeronautics and Astronautics