D L Cain

Occultation Experiment: Results of the First Direct Measurement of Mars's Atmosphere and Ionosphere

G S Levy, A. Kliore, G. Fjeldbo, 1965, Science.

Atmosphere and Ionosphere of Venus from the Mariner V S-Band Radio Occultation Measurement

G S Levy, A. Kliore, G. Fjeldbo, 1967, Science.