| | Showing all published items in the file for Reference Phrase: "Comets Observers' manuals."| 0521520517 | | David H. Levy's guide to observing and discovering comets / by David H. Levy.
| | 0668063777 | | Observer's guide to Halley's comet / James Muirden.
| | 0894901028 | | International Halley watch amateur observers' manual for scientific comet studies / Stephen J. Edberg.
| | 1852335572 | | Observing comets / Nick James and Gerald North.
| |
|
|