67 | The National Academies Press. 1995. doi:10.17226/4894. ISBN 978-0-309-05238-2. "The Sveriges Riksbank Prize in Economic Sciences in Memory of Alfred...
Biographical Memoirs, Volume 67. National Academies Press. p. 179. ISBN 978-0-309-05238-2. Stoiko, Michael (1974). Pioneers of Rocketry. New York: Hawthorn...