Origin and Evolution of Interplanetary Objects: Commissions No. 15, 20, 21, and 22 von Lindblad, B. A., Whipple, Fred L. W., Rahe, Jürgen, Donn, Bertram, Clube, S. V. M., Napier, W. N., Weissman, Paul R., Lagerkvist, Claes-Ingvar, KresáK, Ľubor, Simonenko, A. N., Levin, B. J., Halliday, Ian, Griffin, Arthur A., Blackwell, Alan T., Millman, Peter M., Babadzhanov, P. B., Obrubov, Yu. V., Schuerman, D. W., Weinberg, J. L., Lamy, Philippe L., Morfill, G. E.

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Physics and Chemistry of Comets von Harwit, Martin, Kippenhahn, Rudolf, Trimble, Virginia

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The photographic Perseid meteors von Wright, Frances W., Whipple, Fred L.

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Photographic meteor results for the month of October von Wright, Frances W., Whipple, Fred L.

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Meteor Stream-widths and Radiant Deviations von Whipple, Fred L., Wright, Frances W.

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Photographic i-Aquaridd meteors and evidence for the northern delta Aquarids von Wright, Frances W., Jarchia, Luigi G., Whipple, Fred L.

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Photographic α-Capricornid meteors von Wright, Frances W., Jacchia, Luigi G., Whipple, Fred L.

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Photographic 6-Aquarid meteors von Wright, Frances W., Jacchia, Luigi G., Whipple, Fred L.

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