72
Julian Guthrie, How to Make a Spaceship (New York: Penguin Press, 2016), 323–332.
73
Guthrie, How to Make a Spaceship, 371.
74
Guthrie, How to Make a Spaceship, 376.
75
Irene Klotz, «Space Race 2: Half-price Rockets,» UPI, November 10, 2004.
76
Guthrie, How to Make a Spaceship, 164.
77
«Nominations to the National Aeronautics and Space Administration, Federal Railroad Administration, Consumer Product Safety Commission, and the Metropolitan Washington Airports Authority,» hearing before Committee on Commerce, Science, and Transportation, United States Senate, 109th Cong., April 12, 2005 (statement by Michael Griffin).
