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© 1962 American Institute of Physics.
1962
American Institute of Physics
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Gerard P. Kuiper, Barbara M. Middlehurst, E. J. Öpik; Planets and Satellites. Vol. 3 of The Solar System. Physics Today 1 September 1962; 15 (9): 63. https://doi.org/10.1063/1.3058389
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