International Halley Watch amateur observers' manual for scientific comet studies
By: Stephen J. Edberg. --
Series: Jet Propulsion Laboratory (U.S.). JPL publication ; 83-16
Place of publication: Pasadena, Calif
Number of pages: 28
Subjects: Comets -- Observers' manuals.; Halley's comet -- Observers' manuals.
Notes: Bibliography. *** Contents : pt.1. Methods. -- pt.2. Ephemeris and star charts.

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