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Evolving public perceptions of human spaceflight in American culture. In: History of rocketry and astronautics: Proceedings of the Thirty-Sixth History Symposium of the International Academy of Astronautics: Houston, Texas, U.S.A., 2002 (p. 385). (/isis/citation/CBB001181658/) unapi

Chapter Launius, Roger D. (2009)
Between a rocket and a hard place: Episodes in the evolution of launch vehicle technology. In: History of rocketry and astronautics: Proceedings of the Thirty-Fourth History Symposium of the International Academy of Astronautics: Rio de Janeiro, 2000 (p. 97). (/isis/citation/CBB001181655/) unapi

Book Wormbs, Nina; Källstrand, Gustav (2007)
A short history of Swedish space activities. (/isis/citation/CBB001180801/) unapi

Article Neufeld, Michael J. (1990)
Weimar culture and futuristic technology: The rocketry and spaceflight fad in Germany, 1923--1933. Technology and Culture (pp. 725-752). (/isis/citation/CBB001180280/) unapi