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1
Published 2002
Springer London
Table of Contents: “... and Spectra -- 3 Spectroscopes -- 4 The Spectral Classification of Stars -- Section 2 Practical Amateur...”
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2
by Tonkin, Stephen F.
Published 2000
Springer London
Table of Contents: “... Observation -- 4.1 Observing Criteria -- 5 Understanding the Celestial Sphere -- 5.1 Positional Astronomy...”