| | Showing all published items in the file for Reference Phrase: "Comets Observations."| 0792311647 | | Comets in the post-Halley era / edited by R.L. Newburn, Jr., M. Neugebauer, and J. Rahe ; production editor, L. Fry.
| | 1852330171 | | Observing meteors, comets, supernovae, and other transient phenomena / Neil Bone.
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