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Dynamics of Comets: Their Origin and Evolution [E-Book] : Proceedings of the 83rd Colloquium of the International Astronomical Union, Held in Rome, Italy, 11–15 June 1984 /
Table of Contents: ... XF -- Influence of non-gravitational forces on the orbital evolution of the short-period comets -- On the nongravitational effects in the comet Encke motion -- Section VII. Comet P/Halley and Future Missions to Comets -- The dynamical history of comet...

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Advanced Geostatistics in the Mining Industry [E-Book] : Proceedings of the NATO Advanced Study Institute held at the Istituto di Geologia Applicata of the University of Rome, Italy, 13–25 October 1975 /
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