1. US Department of State, L. V. Berkner, Science and Foreign Relations (1950 — ch. 3, n. 15), pp. 20, 21.
2. J. A. Fleming and V. Laursen, ‘International Polar Year of 1932–33’, Science, vol. 110, 23 September 1949.
3. W. Sullivan, Assault on the Unknown: the International Geophysical Year ( London: Hodder and Stoughton, 1962 ), pp. 17–19.
4. M. Nicolet, ‘The International Geophysical Year (1957–1958): Great Achievements and Minor Obstacles’, Geo Journal vol. 8, no. 4, 1984, pp. 308–9 — emphasis added.
5. D. H. DeVorkin, ‘Organizing for space research: the V-2 rocket panel’, Hist. Stud. Phys. Biol. Sciences, vol. 18, no. 1, 1987.